Best Glaucoma Specialist in Gurgaon

Dr Shibal Bhartiya‘s Credentials at a Glance:

  • 25+ years of experience in ophthalmology
  • Fellowship-trained glaucoma specialist. 3 years dedicated clinical training in glaucoma and cornea, plus concurrent role as Senior Research Associate, AIIMS, New Delhi
  • Structured fellowship, Senior Clinical Research Fellow, Department of Clinical Neurosciences, University of Geneva. Special focus: 24 hour IOP monitoring, Glaucoma lasers, SLT, MIGS )
  • One of few glaucoma specialists also specifically trained in optic neuropathies
  • Mayo Clinic Research Collaborator (current)
  • Executive Editor, Journal of Current Glaucoma Practice
  • 200+ peer-reviewed publications, 90+ on PubMed
  • 28+ edited ophthalmology textbooks
  • 1,580+ five-star patient reviews on Google, Gurgaon practice

Quick Answer: Dr Shibal Bhartiya is a fellowship-trained glaucoma specialist in Gurgaon with over 25 years of experience in ophthalmology. Her training included three years of dedicated glaucoma and cornea clinical training, alongside a concurrent role as Senior Research Associate, at AIIMS New Delhi. This was followed by a structured fellowship in glaucoma in the Department of Clinical Neurosciences at the University of Geneva, with a focus on MIGS. This combination makes her one of a small number of glaucoma specialists also specifically trained in optic neuropathies. Dr Bhartiya is also uniquely positioned to manage glaucoma-related ocular surface disease and dry eye, given her parallel cornea training.

Dr Shibal Bhartiya is a current Mayo Clinic Research Collaborator. She has published more than 200 peer-reviewed papers, and has edited over 28 ophthalmology textbooks. She serves as Executive Editor of the Journal of Current Glaucoma Practice. Across her Gurgaon practice’s 1,580+ verified five-star reviews, patients consistently describe feeling heard and treated as individuals, not just diagnoses, with tests, treatment plans, and disease explained in plain language.

Best Glaucoma Specialist in Gurgaon: What Sets Fellowship-Trained Glaucoma Care Apart

Searching for “best glaucoma specialist Gurgaon” usually surfaces a mix of general ophthalmologists, multi-specialty hospital listings, and very few fellowship-trained subspecialists. The difference matters more in glaucoma than almost any other eye condition. It is a disease that is silent until vision is already lost. The treatment decisions made early determine how much sight is preserved over a lifetime. Also, glaucoma rarely exists in isolation. Glaucoma patients frequently develop dry eye from long-term drop us. Some may present with overlapping optic nerve conditions that a purely glaucoma-trained eye can miss. This page sets out, plainly, what fellowship-level glaucoma training, cross-disciplinary training, and active research involvement actually mean for a patient sitting in the chair.

Dr Shibal Bhartiya is a fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator with over 25 years of experience. Her approach focuses on identifying risk before damage is irreversible, simplifying treatment decisions, and protecting vision long-term. Emphasis on early detection, risk assessment, and continuity of care.

Important: Glaucoma has no symptoms until significant, irreversible vision loss has already occurred in most cases. The qualifications and ongoing research engagement of the specialist you choose is important. It directly affects how early disease is caught and how treatment is sequenced.


What Fellowship-Level Glaucoma Training Looks Like

Training ComponentWhat It MeansWhy It Matters for Patients
Glaucoma + cornea clinical training, plus Senior Research Associate, AIIMS New Delhi3 years of concurrent clinical and research immersion across glaucoma and cornea, alongside high volume, complex glaucoma case exposure; ongoing research collaborations with Prof Tanuj Dada, Head of the Glaucoma Unit at AIIMSUniquely positioned to manage glaucoma-related ocular surface disease and dry eye, which most glaucoma-only specialists are not specifically trained to treat
Structured fellowship, Senior Clinical Research Fellow, Dept of Clinical Neurosciences, University of GenevaFellowship under Prof Tarek Shaarawy, a leading international authority on MIGS, within a neurosciences department rather than a standard ophthalmology unitOne of a small number of glaucoma specialists also specifically trained to manage other optic neuropathies, not just glaucoma in isolation
Mayo Clinic Research Collaborator (current)Active, ongoing collaboration with one of the world’s leading glaucoma research groupsTreatment recommendations are informed by current international research, not outdated protocols
Executive Editor, Journal of Current Glaucoma PracticeReviews and shapes published glaucoma research globallyFirst-hand, early access to emerging evidence and treatment shifts
200+ peer-reviewed publications, 28+ edited textbooksSustained contribution to the field’s evidence base, not just clinical practiceIndicates depth of subject mastery beyond routine patient care
1,585+ five-star Google reviews, Gurgaon practiceSustained, high-volume patient satisfaction across years of practice, not a handful of recent reviewsReal-world evidence that credentials translate into consistent, trusted patient experience — patients consistently describe feeling heard, having unhurried conversations, and treatment explained in terms of quality of life, not just disease numbers

When To See a Glaucoma Specialist (Not a General Ophthalmologist)

  • A family history of glaucoma, especially in a parent or sibling
  • High eye pressure found on a routine check, even without symptoms
  • Diabetes, high myopia, or long-term steroid use
  • Already diagnosed with glaucoma and considering a second opinion before surgery
  • Vision loss that your current doctor has not been able to fully explain
  • Persistent dryness, burning, or irritation alongside long-term glaucoma drop use
  • Considering newer surgical options like MIGS before agreeing to traditional surgery
  • Age over 40 with no eye pressure check in the last two years

What 1,580+ Five-Star Reviews Reflect

Patient tip: A high review volume matters less than what reviews consistently describe. Look for patterns, not just star counts. Most patients call her the best eye doctor, or the best glaucoma specialist in Gurgaon! Most also appreciate how friendly she, and how she especially takes care of children. Several patients mention how much her second opinions, as well as teleconsultations, helped them.

Patients consistently talk of her clear, unhurried explanations. They describe two being told clearly what stage their glaucoma is at. They also say that treatment decisions were explained rather than simply prescribed. In a condition where lifelong monitoring and trust matter as much as any single procedure, that consistency across nearly 1,600 reviews is itself a clinical signal.


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If you’ve been told you have glaucoma, are at risk, or want a second opinion before surgery. Getting a clear, evidence- based, research-informed assessment early protects vision that cannot be regained later. Book an Appointment → contact us | +91 8882638735


Frequently Asked Questions

What makes a glaucoma specialist different from a general eye doctor?

A glaucoma specialist has completed dedicated subspecialty training beyond a general ophthalmology residency. This typically including a fellowship focused entirely on glaucoma diagnosis, surgical management, and long-term monitoring. This means deeper experience with complex cases, newer surgical techniques like MIGS, and treatment decisions. In Dr Bhartiya’s case, her clinical work grounded in evidence based medicine rather than general practice.

Is Dr Shibal Bhartiya the best glaucoma specialist in Gurgaon?

Dr Shibal Bhartiya is a fellowship-trained glaucoma specialist with over 25 years of experience, including dedicated glaucoma and cornea training at AIIMS New Delhi and a structured fellowship at the University of Geneva. She is a Mayo Clinic Research Collaborator, has authored over 200 publications. She has over 1,585 five-star patient reviews on google, most of which call her the best glaucoma specialist or best eye doctor!

What do patients say about Dr Shibal Bhartiya’s care, beyond her credentials?

Across more than 1,580 five-star reviews on google, patients consistently mention the human experience of care. They always mention being heard without feeling rushed, having questions answered in plain language. Patients appreciate that treatment is explained in terms of daily quality of life rather than just numbers and scans. They also appreciate her ethical, personalised care, with no unnecessary tests or surgeries.

Most patients also call her the best glaucoma specialist, or the best eye doctor in Gurgaon. Most also appreciate how friendly she, and how she especially takes care of children. Several patients mention how much her second opinions, as well as teleconsultations, helped them.

Why does training in cornea matter for a glaucoma specialist?

Long-term glaucoma management almost always involves years of preservative-containing eye drops. This commonly cause ocular surface disease and dry eye over time. A glaucoma specialist with concurrent cornea training is able to recognise and manage this overlap directly. Which means Dr Bhartiya does not have to refer patients elsewhere for a problem that the glaucoma treatment itself helped cause.

What does training in optic neuropathies add to glaucoma care?

Glaucoma is itself a type of optic neuropathy. Some patients have overlapping or atypical optic nerve conditions that can be mistaken for glaucoma or missed alongside it. Specialists trained specifically in optic neuropathies, in addition to glaucoma, are better equipped to catch these atypical presentations early and avoid misdiagnosis.

What is MIGS and why does fellowship training in it matter?

MIGS (Minimally Invasive Glaucoma Surgery) is a newer category of glaucoma surgery. This is less invasive than traditional procedures, with faster recovery and fewer complications for suitable candidates. Specialists trained directly with international MIGS researchers are better positioned to judge which patients are good candidates and to perform it safely.

Should I get a second opinion before glaucoma surgery?

Yes, particularly for procedures that are not reversible. Glaucoma surgery decisions benefit from input by a specialist with broad surgical and research experience. The right choice depends on disease stage, risk stratification and patient preference. Dr Shibal Bhartiya explains options, eye anatomy, and how the disease is likely to progress over decades. Her second opinion is not based just current eye pressure.


Key Takeaways

  • Fellowship-level glaucoma training (AIIMS, University of Geneva) means deeper exposure to complex cases and advanced techniques like MIGS
  • Concurrent cornea training at AIIMS uniquely positions her to manage glaucoma-related dry eye and ocular surface disease
  • Geneva fellowship was within a Department of Clinical Neurosciences, adding specific training in optic neuropathies beyond glaucoma alone
  • Active research collaboration (Mayo Clinic) keeps treatment decisions current with global evidence
  • 1,580+ five-star reviews show consistency in patient trust and communication over time
  • Second opinions matter most before irreversible surgical decisions

This page is part of the Glaucoma Hub — covering diagnosis, monitoring, and treatment options for patients seeking specialist glaucoma care in Gurgaon. You may want to read about Glaucoma ProgressionRisk Stratification in Glaucoma, Glaucoma Specialist in Gurgaon. Also interesting could be Advanced Glaucoma Care in Gurgaon, Online Glaucoma Consultation, What Ethical Glaucoma Care Looks Like and Glaucoma Second Opinion — Gurgaon. Other articles of interest could be Advanced Glaucoma Care in Gurgaon, What Good Glaucoma Care Actually Optimises For, What Happens If Glaucoma Is Left Untreated? Please read More Glaucoma Eye Drops is Not Better Glaucoma Care, 5 Mistakes Patients Make in Glaucoma Care and Do You Really Need Treatment for Glaucoma?


About the Author

This article is about Dr Shibal Bhartiya, fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator. She is Clinical Director, Ophthalmology, at Marengo Asia Hospitals, Gurugram, known for ethical, patient-centred glaucoma care and independent glaucoma second opinions. She is also the Program Director for Community Outreach & Wellness; and for the Marengo Asia International Institute of Neuro and Spine.

Dr Bhartiya has published peer-reviewed research on glaucoma management, examining how treatment decisions should balance medical evidence, patient preferences, and long-term vision outcomes.

As Editor-in-Chief of Clinical and Experimental Vision and Eye Research and Executive Editor of the Journal of Current Glaucoma Practice (Pubmed Indexed, official journal of the International Society of Glaucoma Surgery), Dr Shibal Bhartiya brings editorial and research depth to every clinical decision. Her 200+ publications, including 90+ PubMed-indexed publications and 28 edited textbooks span glaucoma biology, surgical outcomes, health equity, and emerging diagnostics.

1580+ Five Star Patient Reviews Google Business Profile

If you are unable to come to Dr Bhartiya’s clinic: Read more about teleconsultation

Read her research on PubMed | Google Scholar | ResearchGate | ORCID

Upload your reports for a structured review.| www.drshibalbhartiya.com | +91 88826 38735

Leave a review on Google


What Happens During a Glaucoma Consultation?

A glaucoma consultation in my clinic follows a structured five-step process. Detailed history and vision assessment, comprehensive eye examination, glaucoma-specific testing (including corneal thickness, eye pressure, gonioscopy, OCT, and visual fields when needed), pupil dilation if required, and a personalized discussion of findings.

Every consultation ends with practical education on how to use eye drops correctly and simple strategies to improve treatment adherence. Successful glaucoma care depends on both accurate diagnosis and consistent treatment.

Dr Shibal Bhartiya is a fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator with over 25 years of experience. Her approach focuses on identifying risk before damage is irreversible, simplifying treatment decisions, and protecting vision long-term. Emphasis on early detection, risk assessment, and continuity of care. She is rated 5 stars across 1,500+ patient reviews on Google.

What Happens During a Glaucoma Consultation? A Doctor’s Walkthrough

Most patients walk into a glaucoma consult expecting a quick pressure check and a prescription. What they get instead, in my clinic, is a sequence. History, vision, anterior segment, a deliberate order of imaging and gonioscopy, baseline pressure testing across more than one visit. The final ten minutes that I consider non negotiable, teaching you how to actually use your drops.

I have refined this sequence over years of glaucoma practice because the disease itself demands it. You cannot feel your eye pressure changing. You cannot feel your nerve fibre layer thinning. The only way to catch glaucoma early and keep it from progressing is a structured, repeatable, slightly unglamorous process. Repeated the same way every single time.

This page walks through that process exactly as it happens in my clinic. So that you know what to expect. It also helps you plan your day better.

Quick Answer: A glaucoma consultation in my clinic moves through five stages. First, the optometrist takes a detailed history and checks vision. This includes uncorrected vision, best corrected vision, and vision with your current glasses. Second, I review that history myself and examine the front of your eye. Third, I run structural and functional tests in a specific order. Corneal thickness, then pressure measurement, then gonioscopy, with OCT and visual field testing done before gonioscopy when they are needed. Fourth, if your pupils need to be dilated, you wait about forty five minutes. Fifth, no consult ends without me personally teaching you how to instil your eye drops correctly and how to remember whether you have taken them.

Dr Shibal Bhartiya Gurgaon glaucoma consultation infographic showing diagnostic testing and treatment pathway steps; navigating glaucoma consultation
A look inside a real glaucoma consultation with Dr Shibal Bhartiya in Gurgaon: structured testing order, baseline pressure checks across visits, and personalised target pressure zones that guide treatment decisions before any drop is prescribed.

Step 1: Before You See Me, the Optometrist Does the Groundwork

Every consult starts with my optometrist, not with me. This is deliberate. It means your history is captured properly and your vision is measured in a structured way before I ever walk into the room.

History taking

The optometrist takes a detailed history and reviews any prior reports, scans, or visual fields you bring with you, noting all of it into your file. This includes systemic conditions that have nothing to do with the eye on the surface, diabetes, high blood pressure, heart disease, asthma, or autoimmune disease, along with any current medications and known allergies. Glaucoma management decisions are frequently shaped by what is happening in the rest of your body, so none of this is skipped.

Three vision measurements, not one

Your vision is then checked through a formal refraction, and three separate numbers are recorded:

  • UCVA, your uncorrected visual acuity, what you see with no glasses at all
  • PGP, your vision with the glasses you are currently wearing and prescribed
  • BCVA, your best corrected visual acuity, what you could see with the ideal glasses prescription

Comparing these three numbers tells me whether a vision problem is about your eyewear, your ocular surface, or your optic nerve, before I have even examined you. A non contact tonometry pressure check is occasionally done at this stage as a screening step. I insist on Goldmann Applanation Tonometry for all of my glaucoma patients.

Step 2: I Review Your History and Examine the Front of the Eye

When you come in to see me, I read through everything the optometrist has documented at a glance. If anything looks incomplete, inconsistent, or worth a second look, I will ask more specific questions to understand it properly before moving forward.

There is also, always, a few minutes of ordinary conversation. A glaucoma consult is a long term relationship, not a transaction. It starts with treating you like a person before a set of test results. And you will be shocked at the details I remember. Your family, your last vacation, your dog 🙂 sometimes, even your favourite chutney!

I then examine the front of your eye in detail. The conjunctiva and ocular surface, the meibomian glands, the eyelid and bulbar conjunctiva, the anterior chamber, and the lens, looking specifically for cataract, a shallow anterior chamber, or any cells in the anterior chamber (inflammation).

Step 3: A Deliberate Order of Testing, Not a Random Checklist

The sequence in which glaucoma tests are performed matters, and I follow a fixed order rather than doing whichever test is most convenient.

Angle assessment first, with imaging informing the decision

I assess the optic nerve with a 90 dioptre lens. Every glaucoma patient gets a gonioscopy. When you need a repeat gonioscopy is decided after that. I perform it only after the visual field test, the OCT, and fundus photography are done, when those are part of that visit. Imaging the nerve and the visual field before manipulating the angle gives me a cleaner functional and structural baseline to work from.

Central corneal thickness, then pressure, then gonioscopy

Before gonioscopy, I measure central corneal thickness (CCT), the test also called pachymetry. Corneal thickness directly affects how your raw eye pressure reading should be interpreted. But it is always done before your tonometry. Because touching your corneas to measure your IOP before the CCT may alter it slightly. Gonioscopy then follows. This examines your drainage angle under magnification. This determines whether you have an open angle or a narrow angle profile.

Why I do the pressure check myself

Goldmann applanation tonometry (GAT), the test that measures your intraocular pressure, is the one test I do not delegate. In my clinic, I personally perform this for every glaucoma patient before treatment starts. Again at the first follow up, and at every annual review. My optometrists are trained to do it and do perform it in my absence. Doing it myself gives me a direct feel for what is happening in your eye that a number on a chart cannot fully convey.

I also insist on doing my gonioscopy myself, always with the lights switched off, so be prepared for a few minutes in a dark room. I keep talking to you, so its never scary.

How is Applanation Tonometry Done?

For the GAT, one of my team members will put some numbing eyedrops and ask you not to touch your eye. I then put a dye which stains your tears yellow. And then I check your eye pressures under blue light on the slit lamp, with a prism that comes close to the eye.

It takes less than a minute if you don’t blink and keep looking straight ahead, and a few extra seconds if you fidget. It’s painless, and quick, and we finish with a drop of antibiotic in the eye.

Step 4: Dilation, When It Is Needed

If your assessment requires dilating your pupils, you will be told this in advance, because dilation takes about forty five minutes to take full effect and changes how you experience the rest of your day.

  • We ask you to bring dark glasses, a scarf, or an umbrella, since dilated eyes are far more light sensitive, particularly in Gurugram’s daytime heat
  • We advise you not to drive yourself home after a dilated examination

Step 5: Establishing a True Baseline, Not a Single Snapshot

Glaucoma decisions should never rest on one reading taken on one day. Two specific habits in my clinic exist to correct for that.

Repeating your first visual field

There is a genuine learning curve to taking a visual field test well. The first attempt is frequently unreliable simply because the patient has not yet learned the rhythm of the test. I routinely discard the first visual field and ask patients to return the next morning. We do not charge for that repeat test. The inaccuracy is a known limitation of the test itself, and is not a reason to bill twice.

Three pressure readings, not one

For a true baseline, I usually take three intraocular pressure readings at different times of day. Rather than relying on a single number, since pressure naturally fluctuates through the day. One of these three readings may be taken by an optometrist, if it’s after my working hours. We usually work from the average of all three.

The water drinking test

A formal diurnal variation test, in which pressure is measured every few hours through the day, is not practical for every patient. We often use the water drinking test as a more practical stand in. This is typically done before starting treatment, again about one to two months after treatment begins. We may repeat it if your eye appears to be progressing despite your pressure meeting its target.

Step 6: Setting Your Personalised Target Pressure

There is no single universal normal pressure number in modern glaucoma care. Your corneal thickness, the structure of your drainage angle, and your Visual field and OCT baseline are combined to calculate a target pressure zone. This is specific to your eye, designed to halt progression for you.

Step 7: The Most Important Section of Glaucoma Consultation: Eye Drop Training

A prescription on its own does not protect your vision if the drops never go in correctly or are forgotten. So every consult ends with practical training, not just instructions.

  • I personally show you how to instil your eye drops correctly, since technique affects how much medication actually reaches the eye
  • I ask you to set a phone alarm for every dose. Because relying on memory alone is the most common reason treatment fails
  • If you are on more than one medication, I recommend keeping two small boxes. One empty and one full of your drop bottles. After each dose, you move that bottle from the full box to the empty one. So a glance at the boxes tells you whether you have already taken that round of drops. And which ones remain.
  • When you leave, my coordinator helps you set your next appointment, before you leave the clinic. You will also receive a Whatsapp message with links to important information and details of phone numbers to book appointments. You will also get my direct phone number for any clinical queries, or emergencies.

When To See Me Before Your Booked Glaucoma Consultation

  • Sudden eye pain, redness, or blurred vision, which can signal an acute angle closure attack
  • Any one sided change in vision or eye appearance
  • Headache or nausea accompanying eye pain
  • A noticeable change in your visual field between scheduled visits
  • New side effects after starting or changing a glaucoma medication
  • Missed doses for several consecutive days, which should be flagged at your next visit rather than left unmentioned

This page is a part of the Glaucoma Hub. you may want to read about Glaucoma Progression, and Risk Stratification in Glaucoma. Other articles of interest could be Advanced Glaucoma Care in Gurgaon, What Good Glaucoma Care Actually Optimises For, What Happens If Glaucoma Is Left Untreated?, More Glaucoma Eye Drops is Not Better Glaucoma Care, 5 Mistakes Patients Make in Glaucoma Care and Do You Really Need Treatment for Glaucoma?


Frequently Asked Questions

Why does the optometrist see me before the doctor does?

The optometrist’s workup, history, refraction, and the three part vision check, ensures your file is complete and your baseline vision is documented accurately before I begin my own examination. This makes the time I spend with you more focused on interpretation and decision making rather than data collection.

Why do you measure my eye pressure yourself instead of leaving it to staff?

Goldmann applanation tonometry is the gold standard pressure test, and for every glaucoma patient I treat, I perform it myself before starting treatment, at the first follow up, and at every annual review. It gives me a direct sense of your eye’s behaviour that I do not want to lose by always delegating it.

Why do you discard my first visual field test and ask me to repeat it?

Most patients have not yet learned the rhythm of the visual field test on their first attempt. This makes that first result unreliable. We ask you to return the next morning for a repeat test. We do not charge for it, since the inaccuracy belongs to the learning curve of the test, not to you.

Why is gonioscopy done after OCT and visual field testing, not before?

When OCT, visual field testing, and fundus photography are part of your visit, I prefer to have that structural and functional picture in hand before manipulating the angle during gonioscopy. The order is chosen to give the cleanest possible baseline. Also, sometimes I use a viscoelastic gel for gonioscopy. In that case, your vision is fuzzy for about ten minutes after, and I don’t want your time wasted.

What is the water drinking test and why would I need one?

It is a practical way of checking how your eye pressure responds to a physiological stress. This is used in place of round the clock diurnal variation testing, which is not feasible for every patient. I typically use it before starting treatment. I may repeat it again a month or two into treatment. And again later if your eye appears to be progressing even though your pressure looks controlled.

Why do you spend time teaching me to put in my own eye drops?

Technique directly affects how much medication reaches your eye. A missed or mistimed dose is the most common reason glaucoma treatment underperforms. Pairing a phone alarm with the two box system is simple. It gives you a simple, visual way to know whether today’s dose has already gone in. Research says it is the most important intervention in preventing glaucoma blindness.

Key Takeaways

  • Your consult begins with the optometrist. They document history and perform three vision measurements, UCVA, PGP, and BCVA, before I examine you
  • Testing follows a fixed order: imaging and visual field first when needed, then corneal thickness, then gonioscopy, then pressure measurement
  • I personally measure your eye pressure for every glaucoma patient at key visits, rather than delegating it
  • Your first visual field is usually repeated free of charge, because of a genuine learning curve with the test
  • Baseline pressure is built from three readings at different times of day, sometimes supplemented by a water drinking test
  • Your target pressure is personalised to your eye’s anatomy, not based on one generic normal number
  • No consult ends without hands on training in how to use your drops. And how to track whether you have taken them

Book a Consultation

If you have been told you have glaucoma, or are due for a routine check because of family history or elevated pressure, this is the process you can expect to walk through.

[Book an Appointment →www.drshibalbhartiya.com | +91 88826 38735]

About the Author

This article was written by Dr Shibal Bhartiya, fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator, Clinical Director at Marengo Asia Hospitals, Gurugram, known for ethical, patient-centred glaucoma care and independent glaucoma second opinions. She is also the Program Director for Community Outreach & Wellness; and for the Marengo Asia International Institute of Neuro and Spine.

She has published peer-reviewed research on glaucoma management, examining how treatment decisions should balance medical evidence, patient preferences, and long-term vision outcomes.

As Editor-in-Chief of Clinical and Experimental Vision and Eye Research and Executive Editor of the Journal of Current Glaucoma Practice (Pubmed Indexed, official journal of the International Society of Glaucoma Surgery), Dr Shibal Bhartiya brings editorial and research depth to every clinical decision. Her 200+ publications, including 90+ PubMed-indexed publications and 28 edited textbooks span glaucoma biology, surgical outcomes, health equity, and emerging diagnostics.

1500+ Five Star Patient Reviews Google Business Profile

If you are unable to come to Dr Bhartiya’s clinic: Read more about teleconsultation

Read her research on PubMed | Google Scholar | ResearchGate | ORCID

Upload your reports for a structured review.| www.drshibalbhartiya.com | +91 88826 38735

Leave a review on Google

Glaucoma Progressing Despite Normal Pressure: 24 Hour IOP

Glaucoma progression despite apparently controlled intraocular pressure is one of the most disorienting experiences a patient can face. It is also one of the most common reasons patients seek a glaucoma second opinion. The reason is almost always the same: daytime clinic readings capture one moment. They do not capture what happens at night, explains Dr Shibal Bhartiya.

Not all glaucoma medications lower pressure around the clock. Brimonidine and timolol both show significantly reduced activity after midnight. A patient whose pressure is controlled at 11 am may have entirely uncontrolled pressure at 3 am — and no standard clinic visit will reveal this.

Dr Shibal Bhartiya is a fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator with over 25 years of experience. Her approach focuses on identifying risk before damage is irreversible, simplifying treatment decisions, and protecting vision long-term. Emphasis on early detection, risk assessment, and continuity of care. She is rated 5 stars across 1,500+ patient reviews on Google.

My Glaucoma Is Progressing But My Pressure Is Always Normal. What Is Going On?

He was in his early sixties — careful, informed, and deeply confused.

He came to me for a second opinion after five to six years under glaucoma care. His file was meticulous. His lifestyle was exemplary — non-smoker, controlled blood pressure, controlled blood sugars. He was on two medications: timolol and brimonidine. His baseline IOP had been 26 to 27 mmHg. On treatment, it now sat at 13 to 14 mmHg at every clinic visit for years.

By every standard measure, he was a success story. But his glaucoma was still progressing.

He was not angry. He was bewildered. I have done everything right, he told me. Why is this still happening?

That question deserved a better answer than he had been given. The answer was in the hours nobody had measured.

The question nobody had asked

I looked at his records and asked him one thing: had anyone ever done a diurnal variation for him? A 24-hour IOP measurement, mapped across day and night? Or a Water Drinking Test?

He said no.

We enrolled him in a study using the Triggerfish sensor — a contact lens device that records continuous IOP fluctuation over 24 hours. The device does not measure absolute pressure values, but it maps the pattern of fluctuation with precision.

The night-time readings were almost double the daytime values.

Most clinic visits measure pressure once, mid-morning, when he was up and about. That is the reading least likely to catch a nocturnal spike. His reassuring numbers, always 13, always 14, had been capturing only half the story. The other half was unfolding while he slept, while no one was measuring, while his optic nerve absorbed damage that nobody anticipated.

Why his medications were failing him at night

The reason was pharmacological, and it is something worth stating clearly: brimonidine and timolol do not work at night. Their pressure-lowering effect drops sharply in the late hours. His reassuring clinic readings — always 13, always 14 — had been capturing only half the story. The other half was invisible, unfolding while he slept, while no one was measuring, while his optic nerve absorbed damage that nobody anticipated.

This is not a failure of the medications. It is a failure of the measurement system — and of the assumption that a daytime number tells the whole story.

What Doctors Often Miss

Brimonidine and timolol do not work at night. This is pharmacology, not failure — their pressure-lowering effect drops sharply in the late hours. It is a well-documented limitation that is not always communicated to patients or factored into treatment decisions.

The result is that a patient can have genuinely excellent daytime control and entirely uncontrolled nocturnal pressure simultaneously. Standard clinic visits — timed to office hours — will never detect this.

The other missed step is the diurnal variation test itself. It is one of the most underused and highest-yield investigations in glaucoma management. It is rarely ordered unless a specialist specifically suspects nocturnal IOP spikes. If your glaucoma is progressing despite apparently good readings, this investigation is worth asking for by name — and a glaucoma second opinion is always reasonable in this situation.


Why Prostaglandins Are First-Line for a Reason

We switched him to bimatoprost 0.01% — a prostaglandin analogue. Prostaglandins are the only class of glaucoma medication proven to work continuously across 24 hours. They do not lose activity at night.

That was in 2012 to 2013. He has been stable for over six years.

One molecule change. One question that had never been asked. Six years of stability that five years of treatment had never delivered.


Symptoms, Pressure Patterns, and When to Investigate

FindingLikely CauseWhen to Investigate Further
Glaucoma progressing despite good clinic IOPNocturnal IOP spike not captured by daytime readingsRequest 24-hour diurnal variation assessment
On timolol or brimonidine, still progressingNight-time loss of drug efficacyAsk whether a prostaglandin has been considered
Visual field deterioration at routine reviewOngoing IOP fluctuation between clinic visitsIOP fluctuation may be as damaging as sustained elevation
Good compliance, good lifestyle, still progressingMedication class mismatch for 24-hour coverageSecond opinion from glaucoma specialist
Pressure controlled but OCT showing RNFL thinningStructural damage continuing despite IOP numbersFull diurnal assessment and treatment review

What This Means for You

If your glaucoma is progressing despite readings that look controlled, the readings may be incomplete — not the whole story, only the morning chapter.

The questions worth asking at your next visit: Has my pressure ever been measured at night? Has anyone checked whether my medications work across 24 hours? Has a prostaglandin analogue been considered as my primary medication?

You are not doing anything wrong. The measurement system may simply be missing the hours that matter most.


If your glaucoma is progressing despite treatment, or if you have never had a 24-hour IOP assessment, a specialist review may give you answers years of routine care have not.

Book a consultation or second opinion with Dr Shibal Bhartiya in Gurgaon.
+91 88826 38735 | www.drshibalbhartiya.com


FAQs

My glaucoma is progressing but my eye pressure is always normal at the clinic. How is that possible?

Clinic readings capture pressure at one moment, usually mid-morning. Eye pressure fluctuates across 24 hours. Certain medications — including timolol and brimonidine — lose effectiveness at night. If pressure spikes at 2 am, no daytime clinic visit will catch it. That spike is still damaging your optic nerve, invisibly, visit after visit.

What is a diurnal variation test and do I need one?

A diurnal variation maps your eye pressure across the full day and night. It is recommended when glaucoma is progressing despite apparently controlled pressure, when you are on medications that may not provide round-the-clock coverage, or when your specialist suspects night-time IOP spikes. It is one of the most underused and highest-yield tests in glaucoma management.

Why are prostaglandin eye drops the first choice for glaucoma?

Prostaglandins are the only class of glaucoma medication that works continuously across 24 hours. Other drugs — including timolol and brimonidine — show significantly reduced activity at night. For long-term pressure control, the night-time hours matter as much as the daytime ones. This is why prostaglandin analogues are recommended as first-line therapy in international glaucoma guidelines.

Can glaucoma progress even when I am doing everything right?

Yes, and it is more common than patients realise. Controlled daytime pressure, healthy lifestyle, medication compliance — none of these guarantee protection if night-time IOP is unaddressed. Progression despite apparent control is a signal to investigate further, not to doubt yourself. A glaucoma second opinion is always reasonable in this situation.

Should I ask for a 24-hour IOP test if my glaucoma is progressing?

Yes. If your visual fields are declining despite good clinic readings, a diurnal variation assessment is a reasonable and important next step. Ask your glaucoma specialist specifically about this. It is a question worth asking at your next visit.


This page is part of the Advanced Glaucoma Care hub. Read about the full spectrum of glaucoma diagnosis and treatment. Please also read about Diurnal Variation of IOP, Target IOP and Glaucoma Eye Drops.

You may want to watch this podcast I did several years ago, for Health Talks.


Note: Contact Lens Monitor for Continuous IOP Monitoring

Triggerfish® contact lens sensor is a specialised diagnostic contact lens used in glaucoma care to monitor intraocular pressure (IOP)–related changes over 24 hours. Unlike routine pressure measurements taken during clinic hours, the Triggerfish lens (Sensimed Triggerfish) helps detect pressure fluctuations that may occur at night or outside OPD visits, which can sometimes explain progression despite apparently controlled readings. It does not measure pressure directly in mmHg but records circumferential corneal changes related to IOP patterns, helping glaucoma specialists better understand individual risk profiles and treatment needs in selected patients.

Dr Shibal Bhartiya was the first doctor in India to use the Triggerfish® contact lens sensor for Continuous IOP Monitoring in clinical practice. Her initial experiences on Intraocular pressure (IOP) related pattern in patients with primary angle closure (PAC) and primary angle closure glaucoma (PACG) before and after laser peripheral iridotomy (LPI) was presented at ARVO, in Orlando Florida in 2014

IOP Fluctuation and Angle Closure Glaucoma

IOP fluctuation is a particular concern in angle closure disease, where pressure spikes can be steep and are frequently missed by routine daytime readings. Dr Bhartiya’s published research has examined this directly. A 2015 study in the Journal of Current Glaucoma Practice, Diurnal Intraocular Pressure Fluctuation in Eyes with Angle-Closure (Bhartiya S, Ichhpujani P; PMID: 26997828), investigated IOP fluctuation across the day in 77 newly diagnosed angle closure patients and documented the range and pattern of diurnal variation in this group.

A 2019 review in the Romanian Journal of Ophthalmology, Diurnal Variation of IOP in Angle Closure Disease: Are We Doing Enough? (Bhartiya S et al.; PMID: 31687621), went further — finding that many clinical decisions in angle closure glaucoma management are based on only one or two IOP measurements, and arguing that this is insufficient given the established circadian rhythm of IOP and its direct correlation with glaucoma progression. Taken together, these papers make the case that angle closure patients may be among the most undertreated precisely because their worst pressure moments are the least observed.


About the Author

This article was written by Dr Shibal Bhartiya, fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator, Clinical Director at Marengo Asia Hospitals, Gurugram, known for ethical, patient-centred glaucoma care and independent glaucoma second opinions. She is also the Program Director for Community Outreach & Wellness; and for the Marengo Asia International Institute of Neuro and Spine.

As Editor-in-Chief of Clinical and Experimental Vision and Eye Research and Executive Editor of the Journal of Current Glaucoma Practice (PubMed-indexed, official journal of the International Society of Glaucoma Surgery), Dr Shibal Bhartiya brings editorial and research depth to every clinical decision. Her 200+ publications, including 90+ PubMed-indexed publications and 28 edited textbooks, span glaucoma biology, surgical outcomes, health equity, and emerging diagnostics.

1,500+ Five Star Patient Reviews — Google Business Profile

Read her research on PubMed | Google Scholar | ResearchGate | ORCID

Upload your reports for a structured review. | www.drshibalbhartiya.com | +91 88826 38735

Leave a review on Google

Glaucoma and Headaches

Acute and intermittent angle closure glaucoma can present with severe headache, nausea, vomiting, and coloured haloes around lights — symptoms so closely overlapping with migraine that patients spend years in neurology before anyone examines their drainage angles. A gonioscope placed at a routine eye examination can reveal in minutes what years of migraine treatment cannot resolve.

For patients with narrow angles, a laser peripheral iridotomy, a five-minute outpatient procedure — may eliminate the trigger entirely. The eye and the head are not separate systems.

Dr Shibal Bhartiya is a fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator with over 25 years of experience. Her approach focuses on identifying risk before damage is irreversible, simplifying treatment decisions, and protecting vision long-term. Emphasis on early detection, risk assessment, and continuity of care. She is rated 5 stars across 1,500+ patient reviews on Google.


Seven Years of Migraines That Disappeared After a Routine Eye Examination

She was in her late forties or early fifties. She had no eye complaints.

It was a routine check — glasses, perhaps a small change in power. I noticed a shallow anterior chamber, explained she needed a gonioscopy. Asked her if she had experienced any headaches, or coloured haloes around lightbulbs.

She talked. She had been living with migraines for seven to eight years. Treatment after treatment. Specialist after specialist. The headaches kept coming.

If you are reading this after years of treatment that has not worked, I want you to know: that exhaustion is real, and it is not in your head. But the answer sometimes is — in your eyes.

I looked at her angles. They were narrow. Both eyes.


What a gonioscope found that years of migraine treatment missed

I placed a gonioscope, a contact lens with a mirror that allows direct visualisation of the eye’s drainage angle, and examined both eyes carefully. She had primary angle closure. Peripheral anterior synechiae were present in roughly a quadrant of each eye — meaning parts of the drainage angle had already begun to stick shut. Her IOP was in the range of 22 to 24 mmHg.

A standard migraine workup does not include a gonioscope. A glaucoma specialist examination does.


Why angle closure symptoms feel exactly like a migraine

In intermittent angle closure, the drainage angle narrows and blocks without fully closing. Pressure builds, then releases. The episode passes. No one connects it to the eye.

During these episodes, the symptoms are: severe throbbing headache, nausea, vomiting, coloured haloes around lights and streetlamps, eye redness, and a deep ache around the orbit. These are textbook migraine symptoms. They are also textbook intermittent angle closure symptoms. Without a gonioscope, there is no way to tell them apart from a history alone.


If your migraines have not responded to treatment, or if your headaches come with coloured halos or eye pain, a glaucoma specialist examination may give you answers years of headache treatment have not.

Book a consultation with Dr Shibal Bhartiya in Gurgaon. Second opinions welcome.
+91 88826 38735 | www.drshibalbhartiya.com


Symptoms, Causes, and When to Worry

SymptomLikely CauseWhen to Worry
Severe throbbing headacheIntermittent IOP spike from narrow anglesAttacks are recurring, not relieved by migraine medication
Nausea and vomiting with headacheAcute pressure rise, vagal responseAccompanying eye redness or blurred vision
Coloured halos around lightsCorneal oedema from raised IOPAny episode with halos warrants urgent eye evaluation
Eye ache or pain around orbitElevated intraocular pressurePersists beyond the headache episode
Blurred vision during headacheRaised IOP affecting corneal clarityVision does not fully recover after episode
Headache worse in dim light or eveningPupil dilation narrows angles furtherConsistent pattern linked to lighting conditions

What Doctors Often Miss

Neurologists and general physicians are not trained to examine drainage angles. That is not a criticism — it is a structural gap. A gonioscope is a specialist instrument used by ophthalmologists and glaucoma specialists. It is not part of a standard headache workup, and it is not part of most routine optometry checks either.

The result is that intermittent angle closure goes undiagnosed for years in patients who are otherwise receiving excellent neurological care. The migraine label is applied because the symptoms fit. The eye is never examined. The pressure spikes continue.

If you have been diagnosed with migraines and you have never had your angles examined, that is worth a second opinion from a glaucoma specialist.

The other missed signal is coloured halos. Many patients mention them. Fewer doctors follow up specifically on the eye examination that halos warrant.


A five-minute laser. Ten migraine-free years.

We performed a laser peripheral iridotomy — a small opening in the iris, made with a laser, in the clinic, in under ten minutes. It allows aqueous fluid to flow freely, relieves intermittent pressure build-up, and eliminates the trigger that narrow angles create.

That was ten years ago.

She has not had a single migraine attack since.

An occasional headache, she tells me — but she has her own explanation for those. “Those are because of who I am married to,” she said.

Whether the angle closure was the direct cause of her migraines or a powerful intermittent trigger, the outcome speaks for itself. A gonioscope at a routine eye check gave her back ten years of her life.


What This Means for You

Narrow angles produce no symptoms between episodes. An eye that looks entirely normal — good vision, no redness, no pain — can have drainage angles that are quietly narrowing with every passing year.

The only way to know is an examination that includes gonioscopy. If you have recurring headaches that have not responded to treatment, if your headaches come with coloured halos or eye pain, or if you have a family history of glaucoma, angle closure, or are significantly long-sighted — ask your eye doctor specifically whether your angles have been examined.

A laser peripheral iridotomy takes ten minutes. The benefit, as one patient told me a decade later, can last a lifetime.


FAQs

Can narrow angles or angle closure actually cause migraines?

Narrow angles cause intermittent spikes in eye pressure. These spikes produce headache, nausea, vomiting, eye pain, and coloured haloes — symptoms that overlap significantly with migraine. Whether angle closure directly causes migraines or acts as a powerful intermittent trigger remains an open clinical question. What is well-documented is that some patients with long-standing treatment-resistant headaches find complete or substantial relief after laser iridotomy.

How do angle closure symptoms mimic a migraine attack?

The overlap is striking and clinically important. Acute or intermittent angle closure can cause severe throbbing headache, nausea and vomiting, coloured haloes around lights and streetlamps, eye redness, blurred vision, and a dull ache around the eye socket. Many patients — and sometimes their doctors — attribute these episodes to migraine, tension headache, or stress for years. The eye is rarely examined. A gonioscope at one routine visit can change everything.

What are coloured haloes and why do they appear in angle closure?

When eye pressure rises suddenly, fluid accumulates in the cornea. This causes light to scatter as it enters the eye, producing rainbow-coloured rings around light sources — bulbs, headlights, streetlamps. Coloured haloes are a warning sign. They warrant an urgent eye evaluation, not just a change in glasses. If your headaches come with haloes around lights, tell your eye doctor specifically.

What is a laser peripheral iridotomy and is it a major procedure?

It is a minor outpatient laser procedure done in the clinic, usually in under ten minutes. A small opening is created in the iris to allow fluid to drain freely and relieve the pressure build-up caused by narrow angles. There is no incision, no hospitalisation, and no general anaesthesia. Most patients resume normal activity the same day.

Who should be screened for narrow angles?

Anyone with a family history of angle closure glaucoma, anyone of East or South Asian descent, anyone who is significantly long-sighted (hypermetropic), and anyone over 40 with unexplained recurrent headaches, eye ache, or coloured haloes around lights. Narrow angles cause no symptoms until a pressure spike begins — and by then, some damage may already have occurred.

Can treating narrow angles prevent glaucoma entirely?

In many cases, yes. A timely laser iridotomy in a patient with primary angle closure — before significant optic nerve or drainage angle damage — can halt the glaucoma disease process entirely. This is why early detection matters. The laser takes minutes. The benefit can last a lifetime.


This page is part of the Advanced Glaucoma Care hub. Read about the full spectrum of glaucoma diagnosis and treatment. Please also read about Laser Treatments for Glaucoma, Narrow Angles and Gonioscopy.

You may want to watch this podcast I did several years ago, for Health Talks.


About the Author

This article was written by Dr Shibal Bhartiya, fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator, Clinical Director at Marengo Asia Hospitals, Gurugram, known for ethical, patient-centred glaucoma care and independent glaucoma second opinions. She is also the Program Director for Community Outreach & Wellness; and for the Marengo Asia International Institute of Neuro and Spine.

As Editor-in-Chief of Clinical and Experimental Vision and Eye Research and Executive Editor of the Journal of Current Glaucoma Practice (PubMed-indexed, official journal of the International Society of Glaucoma Surgery), Dr Shibal Bhartiya brings editorial and research depth to every clinical decision. Her 200+ publications, including 90+ PubMed-indexed publications and 28 edited textbooks, span glaucoma biology, surgical outcomes, health equity, and emerging diagnostics.

1,500+ Five Star Patient Reviews — Google Business Profile

Read her research on PubMed | Google Scholar | ResearchGate | ORCID

Upload your reports for a structured review. | www.drshibalbhartiya.com | +91 88826 38735

Leave a review on Google