Tag: glaucoma surgery recovery

THE BLEBITIS RESCUE

Redness, pain, light sensitivity, and watering after glaucoma surgery can be signs of blebitis and should not be ignored. Early assessment and treatment may help protect vision and reduce the risk of complications.

Trabeculectomy creates a delicate subconjunctival filtration bleb to manage intraocular pressure. This pathway remains vulnerable to late-stage bacterial invasion. Acute blebitis is a sight-threatening emergency. Rapid conjunctival infection can breach the intraocular space, causing devastating endophthalmitis. Management requires immediate, high-dose targeted antimicrobial therapy and aggressive clinical tracking to salvage both the surgical site and the patient’s vision.

Critical Care After Glaucoma Surgery: Managing Blebitis

A sportsman who had undergone a successful trabeculectomy years earlier walked into my clinic with a red eye, with a foreign body sensation.

I remembered the “RSVP” you had taught me doc, he said, and this seemed like it.

Redness, light Sensitivity, Watering, or worsening Vision, Pain, after glaucoma surgery can be warning signs of blebitis. While not every irritated eye is infected, these symptoms should not be ignored—please contact your eye surgeon promptly for assessment and avoid self-medicating with eye drops.

The filtering bleb looked red an angry, with lots of dilated blood vessels. Classic presentation of acute blebitis. The delicate filtration bleb that had been protecting his sight from glaucoma had become an open entry point for aggressive bacteria. If the barrier collapsed completely, the infection would flood the interior of the eye. Irreversible vision loss often follows.

Standard protocol often favours rapid surgical revision or fluid taps. These add direct trauma to already inflamed, fragile ocular tissue. I chose a different path.

We initiated an immediate, round-the-clock regimen of fortified, high-potency targeted antimicrobial drops. I tracked the infection at the slit-lamp every few hours. Through meticulous, intensive non-surgical care, the bacterial advance halted. The infection cleared. The filtration bleb survived intact. The patient’s vision was fully protected.

True clinical expertise knows exactly when aggressive medical salvage is the right call — and when the knife is not.

His bleb is thin, and requires a revision. A planned, safer surgery, than an emergency surgery on an infected eye. Will keep you posted on how he’s doing.

FAQs

What is a glaucoma filtration bleb, and why can it become infected?

A trabeculectomy creates a small fluid bubble under the conjunctiva called a filtration bleb, which allows excess fluid to drain from the eye. The tissue over this bleb is intentionally very thin to allow fluid transmission. That thin tissue can occasionally become vulnerable to surface bacteria, causing a localised infection called blebitis.

What are the warning signs of a late glaucoma surgery infection?

Any patient who has had filtering surgery must seek immediate specialist care if they develop sudden deep eye pain, rapidly worsening vision, thick yellow or white discharge, light sensitivity, or intense redness concentrated over the top of the eyeball. These symptoms are a medical emergency.

Is blebitis an emergency?

Blebitis can become serious if treatment is delayed. Early evaluation helps reduce the risk of infection spreading and vision-related complications.

Can blebitis be treated?

Yes. Treatment depends on severity and may include medications and close follow-up. Early diagnosis often improves outcomes.

How to prevent blebitis?

To reduce the risk of blebitis after glaucoma surgery, attend regular follow-ups, avoid rubbing the eye, use prescribed drops exactly as advised, maintain good hand hygiene, and seek prompt review if you notice redness, pain, watering, discharge, or light sensitivity.

This page is part of the Advanced Glaucoma Care hub. Read about the full spectrum of glaucoma diagnosis and treatment.

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 Surgery in Gurgaon

Glaucoma Surgery in Gurgaon

Glaucoma surgery lowers eye pressure to protect your optic nerve when drops and laser are not enough. Dr Shibal Bhartiya performs MIGS, trabeculectomy, tube shunts, and revision surgery in Gurgaon.

Glaucoma surgery is not the starting point. When it becomes necessary, the choice of operation and its timing shape how much vision you keep for life.

 

This page explains glaucoma surgery from a patient’s view. It covers when surgery is needed, how a specialist chooses an operation, what each one involves, and what recovery looks like. It is written for patients in Gurgaon and across Delhi NCR who face surgery, hold a referral, or want a clear answer.

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 1,700+ patient reviews on Google.

Known for her structured approach to glaucoma risk assessment and progression analysis, Dr Shibal Bhartiya provides trusted second opinions for patients seeking clarity before major treatment decisions. Both, in person, and online.

 

When Is Glaucoma Surgery Necessary?

Most glaucoma treatment starts with eye drops, laser, or both. Surgery becomes necessary when these cannot protect your optic nerve over the long term. Five situations lead to it:

Surgery is not always a last resort. In advanced disease or fast progression, earlier surgery often protects more vision.

Read the full indications for glaucoma surgery and how Dr Bhartiya decides when to recommend surgery. Please also read Avoid Glaucoma Surgery, Myths About Eye Pressure, and Glaucoma Visual Symptoms in Real Life.

Have an emergency/quick query

WhatsApp +91 98187 00269

Get an appointment now

Call +91 88826 38735, +91 98187 00269

Understanding What Glaucoma Surgery Does

All glaucoma surgery works in one of two ways. It improves drainage of fluid out of the eye, or it reduces fluid production inside the eye. Either way, the goal is to lower pressure to a level that protects the optic nerve.

Surgery does not restore vision already lost. Damage from glaucoma is irreversible. Surgery protects the vision you have. That is why timing matters. Surgery at the right moment saves more vision than surgery that comes too late.

Types of Glaucoma Surgery

Trabeculectomy vs MIGS: How the Choice Is Made

Patients and referring doctors ask this often. The answer is never one size fits all. Both operations lower eye pressure. The difference lies in how much reduction you need, how much risk you accept, and what your disease looks like over decades.

MIGS gives a gentler pressure reduction, with lower risk and faster recovery. It suits mild to moderate disease where modest lowering is enough. It works especially well when you also need cataract surgery.

Trabeculectomy lowers pressure more deeply and for longer. It remains the reference operation when the nerve needs very low pressure to survive. The trade-off is a harder recovery and more complications to manage.

Severity alone does not decide it. A young patient with moderate glaucoma and a low target may do better with trabeculectomy now than with MIGS that falls short in five years. An older patient with less lifetime risk may do well with MIGS and cataract surgery together.

This is why the decision needs a specialist’s assessment, not a formula. Age, stage, rate of progression, target pressure, conjunctival health, and your ability to attend follow-up all count.

If you have been quoted one procedure and feel unsure, a structured glaucoma second opinion before you proceed is reasonable.

Minimally Invasive Glaucoma Surgery (MIGS)

MIMIGS is a family of newer procedures. They lower pressure through very small incisions and have a better safety record than traditional surgery. Most use local anaesthesia, many combine with cataract surgery, and recovery is faster.

Who is MIGS suitable for? 

MIGS suits mild to moderate glaucoma. It suits people who want fewer drops and people who need cataract surgery too. It also suits early disease that keeps progressing despite maximum tolerated medication, and eyes where the risks of trabeculectomy outweigh the benefit.

How does MIGS work? 

Different procedures work in different ways. The iStent and Hydrus place a tiny implant that bypasses the trabecular meshwork. The Kahook Dual Blade and Trabectome remove part of the meshwork. The XEN gel stent creates a new drainage route under the conjunctiva.

What MIGS cannot do: it cannot reach the very low pressures that trabeculectomy can. If you have advanced damage and need pressure in the low teens or single digits, MIGS alone is usually not enough.

The combined cataract and MIGS procedure 

If you have both conditions, combining phacoemulsification with MIGS is often the logical choice. Cataract surgery alone lowers pressure a little in many eyes. Adding MIGS strengthens the effect. You often need fewer drops afterwards, with one recovery.

Selective Laser Trabeculoplasty (SLT) 

SLT is not surgery in the usual sense. It sits between drops and surgery in the treatment path. A laser applied to the drainage angle improves outflow. It works as a first treatment or an add-on, you can repeat it, and it does not rule out later surgery. In early to moderate open-angle glaucoma, SLT can delay or reduce the need for surgery.

Dr Bhartiya has extensive experience in risk stratification and long-term glaucoma care, including hundreds of SLT and LPI procedures.

Selective Laser Trabeculoplasty (SLT)

While not a surgical procedure in the traditional sense, SLT deserves mention here because it sits between drops and surgery in the treatment pathway. It uses a laser applied to the drainage angle to stimulate improved outflow. It is effective as a first-line treatment or adjunct, repeatable, and does not preclude future surgery. For appropriate patients — particularly those with early to moderate open-angle glaucoma — SLT can delay or reduce the need for surgery.

Dr Bhartiya is a glaucoma specialist with extensive experience in risk-stratification and longitudinal glaucoma care, including hundreds of SLT and LPI laser procedures.

Trabeculectomy

Trabeculectomy is the most extensively studied glaucoma operation. It has been in use for over 50 years. When surgeons perform it well and follow it closely, it remains the reference operation when very low pressure is needed.

What does trabeculectomy involve? 

The surgeon creates a small flap in the wall of the eye, the sclera. Fluid drains through it to just under the conjunctiva and forms a small reservoir called a bleb. The bleb slowly absorbs the fluid and lowers pressure.

An antifibrotic agent, usually Mitomycin C, reduces scarring during surgery. Scarring is the main reason trabeculectomy fails over time. The surgeon matches the dose and exposure time to each patient.

Who needs trabeculectomy? 

Trabeculectomy is indicated in moderate to advanced glaucoma that needs a large and lasting fall in pressure, beyond what MIGS can reliably give. It also suits these situations:

  • Advanced disease where pressure must reach very low levels
  • Earlier MIGS that fell short
  • Rapid progression with a nerve at high risk
  • A young patient with decades of disease ahead

Some patients stay off drops for years afterwards. Not all do.

What are the risks of trabeculectomy? 

Trabeculectomy is effective, but it is not simple. Risks include pressure that falls too low (hypotony), bleb complications, cataract, and infection. Infection of the bleb or inside the eye (blebitis or endophthalmitis) is rare but serious. You may need more treatment if the bleb scars.

This is why patient selection, careful technique, and close follow-up matter, especially in the first weeks.

Surgeon experience matters too. Outcomes depend on the surgeon and on postoperative care. A failing bleb can often be rescued, but only if the surgeon spots it early and acts.

Tube Shunt Surgery (Glaucoma Drainage Devices)

For patients in whom trabeculectomy has failed, or is likely to fail, tube shunts — such as the Ahmed Glaucoma Valve or Baerveldt implant — provide an alternative drainage pathway. A small silicone tube is implanted in the eye, connected to a plate placed on the surface of the eye under the conjunctiva. Fluid drains through the tube to the plate, where it is absorbed.

Tube shunts are used in:

    • Refractory glaucoma where prior trabeculectomy has failed

    • Eyes with severe scarring that makes trabeculectomy unlikely to succeed

    • Neovascular glaucoma

    • Eyes that have had multiple previous surgeries

    • Certain complex secondary glaucomas

Tube surgery is longer and more involved than trabeculectomy, but it is a valuable and often vision-saving option for patients with complex disease.

Cyclodestructive Procedures

In cases where other surgical options are not suitable, cyclodestructive procedures are an option. This includes advanced disease with limited visual potential, or patients who are not candidates for incisional surgery. The ciliary body (which produces aqueous fluid) is treated to reduce fluid production. the most commonly used technique is Diode laser cyclophotocoagulation (DLCP). It is not a first-choice procedure in eyes with good visual potential, but has an important role in selected cases.

How Is the Right Surgery Chosen?

Patients ask this most often about glaucoma surgery in Gurgaon. There is no formula. The choice rests on six things. Read also how Dr Bhartiya decides when to recommend surgery.

Severity. Mild disease that needs modest lowering points toward MIGS. Advanced disease that needs very low pressure points toward trabeculectomy. Complex or refractory disease may need a tube.

Age. A 45-year-old needs a solution that lasts decades. A 78-year-old with the same pressure may carry a very different lifetime risk.

Conjunctival health. Trabeculectomy and tube surgery need healthy conjunctiva. Earlier surgery, long use of some drops, or a failed bleb can damage it. The plan must account for this.

Cataract. If you need cataract surgery too, combining it with MIGS is often the most efficient path. If not, more options open up.

Your ability to attend follow-up. Trabeculectomy needs close visits in the first weeks, for bleb care, suture lysis, and checks for low pressure. If you cannot attend, a procedure with a lighter recovery may suit you better.

Surgeon experience. Outcomes depend strongly on the surgeon. An experienced surgeon doing the right operation beats a theoretically ideal operation done rarely.

Who Is Not an Ideal Candidate for Each Operation

Each operation has limits. These are the situations where a procedure fits poorly, or where surgery should wait.

  • MIGS: a poor fit for advanced glaucoma that needs very low pressure, a closed or badly scarred angle, or neovascular glaucoma.
  • Trabeculectomy: a poor fit with a scarred conjunctiva, active inflammation, or if you cannot attend early follow-up.
  • Tube shunt: weigh it with care if the corneal lining is weak, because a tube can strain it.
  • Cyclodestructive laser: not a first choice when useful vision remains.
  • Any glaucoma surgery: wait during an active eye infection. Plan with your physician if you take blood thinners or have uncontrolled diabetes or blood pressure. Never stop a blood thinner on your own.

If your pressure sits at target and your tests stay steady, surgery adds risk without adding benefit. Read Avoid Glaucoma Surgery.

When Other Eye Conditions Change the Surgical Plan

Many people with glaucoma have a second eye problem. It can change which operation fits and when to do it.

  • Cataract: the surgeon may combine both operations. In some angle closure eyes, lens removal comes first. Read cataract in glaucoma patients.
  • Dry eye from glaucoma drops: the surface needs treatment first, or a switch to preservative-free drops. Surgery that reduces your drops may help. A scarred surface limits some operations. Read glaucoma and dry eye.
  • Diabetic retinopathy or neovascular glaucoma: the retina and the glaucoma need treatment together.
  • Uveitis: the inflammation must settle first. It also changes which operation suits you.
  • Corneal disease: a drainage tube can strain a weak corneal lining. The surgeon weighs this before choosing a device.
  • Earlier eye surgery: fewer options remain, and scarring risk rises.

What to Expect: Before, During, and After Surgery

Before Surgery 

You have a detailed assessment of your glaucoma history, medicines, eye surface, and general health. Dr Bhartiya then explains the plan in full. She covers which procedure, whether to combine it with cataract surgery, whether to use an antifibrotic, and which anaesthesia. You will know exactly what is planned and why.

Some glaucoma drops may continue or change before surgery. Blood thinners may need a pause, agreed with your physician.

The Day of Surgery 

Most glaucoma operations use local anaesthesia with sedation and are day procedures. Most people go home the same day. Surgery usually takes 30 to 60 minutes, depending on the procedure. Bring someone to take you home.

Immediately After Surgery

The eye is padded. Vision is blurred at first, and the eye may feel uncomfortable. This is normal. You start antibiotic and anti-inflammatory drops straight away. They are essential to the result. You may also continue your glaucoma drops.

After trabeculectomy, the first two to four weeks matter most. Your doctor checks eye pressure, bleb appearance, and chamber depth closely. She may adjust the bleb, with suture lysis or bleb massage, if needed. Do not miss follow-up visits in this period.

Recovery Timeline 

MIGS with cataract surgery: most people recover in one to two weeks. Drops continue for several weeks.

Trabeculectomy: functional recovery takes four to twelve weeks, until vision settles and pressure reaches its longer-term level. The bleb keeps maturing for months.

Avoid strenuous activity, swimming, and eye rubbing. How long depends on your procedure, and Dr Bhartiya will tell you.

Long-Term Follow-Up 

Glaucoma surgery is not a cure. It lowers pressure. You need lifelong monitoring with OCT, visual fields, and pressure checks. These show whether the disease stays stable and catch late failure early.

Some people stay off drops for years after trabeculectomy. Others restart drops months or years later as the bleb matures or scars. After MIGS, many people continue on fewer drops.

What Surgery Cannot Promise 

Vision can dip for a while after surgery. Trabeculectomy can speed up cataract. Some eyes need a second operation or a bleb needling. Every operation carries a small risk of infection and of pressure falling too low. Dr Bhartiya explains these risks for your eye before you decide.

Glaucoma Surgery in Gurgaon: What to Look For in a Surgeon 

Outcomes depend on three things: the right procedure for the right patient, careful technique, and close postoperative care.

If you are considering glaucoma surgery in Gurgaon, ask these questions:

  • Has this surgeon done this exact procedure many times?
  • Does the surgeon manage your follow-up, or hand it off?
  • What is the protocol for bleb care after trabeculectomy?
  • What happens if the pressure target is missed?

Dr Shibal Bhartiya performs the full range of glaucoma surgery in Gurgaon: MIGS, trabeculectomy, tube shunts, and revision of failed earlier surgery. She manages every surgical patient personally through recovery. She has performed and published on glaucoma surgery outcomes for over two decades.

If you have been told you need surgery, or you are unsure it is the right next step, a structured consultation can help. It includes a review of your existing reports.

Frequently Asked Questions 

Does glaucoma surgery restore vision? 

No. Glaucoma surgery lowers eye pressure to protect the optic nerve from further damage. It does not reverse damage already done. This is why timing matters.

Is glaucoma surgery painful? 

Most people feel little pain. Your surgeon chooses topical, local, or general anaesthesia. You may feel some aching in the first day or two. Simple painkillers help.

Can glaucoma come back after surgery? 

Glaucoma is a lifelong condition. Surgery controls pressure but does not cure the disease. Pressure can rise again over months or years if the drainage pathway scars. You may then need more treatment. This is why long-term follow-up is essential.

How long does a trabeculectomy last? 

Many people keep good pressure control for years. Some need drops again, a bleb needling, or another operation. Dr Bhartiya can tell you what to expect for your eye.

Can I have glaucoma surgery and cataract surgery at the same time? 

Yes, in selected patients. Combined phacoemulsification and MIGS is well established for mild to moderate glaucoma with cataract. In more advanced glaucoma, the surgeon may combine or stage the operations. Remember, cataract surgery does not protect you from glaucoma.

What if my earlier glaucoma surgery has failed?

Needling with antifibrotics can sometimes rescue a failed bleb. If it cannot, revision surgery or a tube shunt is next. This needs glaucoma specialist expertise. Not every surgeon manages complex revisions.

Who should not have glaucoma surgery? 

Each operation has its own poor fits. MIGS suits advanced glaucoma badly. Trabeculectomy suits a scarred conjunctiva badly. A tube needs care when the corneal lining is weak. Active infection delays any operation.

What if I have dry eye or another eye condition? 

 Dry eye changes which operation fits. A scarred surface limits trabeculectomy and tube surgery. The surface needs treatment first, or a switch to preservative-free drops. Cataract, retinal disease, uveitis, and corneal disease also shape the plan

What does glaucoma surgery cost in India?

Cost depends on the procedure, the implant, the hospital, the anaesthesia, and your follow-up. MIGS with cataract surgery, trabeculectomy, and tube shunts each have a different cost.

Quoting a figure before an examination is not responsible. Surgery should match your stage of disease. An experienced surgeon should perform it, and you must attend early follow-up. Ask for an itemised estimate: surgeon fee, implant, hospital, and follow-up visits.

To learn what surgery suits your eye, and what it will cost, call +91 88826 38735 to book an appointment.

Book a Consultation 

Advised glaucoma surgery in Gurgaon? Bring your reports before you decide. Dr Bhartiya will tell you plainly whether you need surgery, and which operation suits your eye.

Call +91 88826 38735, or upload your reports for review. She also works with your local eye doctor if you live elsewhere.

Dr Shibal Bhartiya consults for glaucoma surgery in Gurgaon. For appointments, contact +91 88826 38735. If you are seeking a second opinion before proceeding with surgery, a structured glaucoma second opinion is available.

About the Author

This 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.

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. She is also a committed patient advocate and mainstream medical columnist, translating complex ophthalmic evidence into actionable public health insights across leading national platforms including NDTV and OnlyMyHealth

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). Her 200+ publications, including 90+ PubMed indexed publications and 28 edited textbooks span glaucoma biology, surgical outcomes, health equity, and emerging diagnostics.

1700+ 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 | Github | Wikidata

Upload your reports for a structured review.| Contact Us| +91 88826 38735

Helped by this article? Leave a Google review— it helps other patients find reliable eye care.

Last Reviewed: October 2026

These peer-reviewed articles discussing Glaucoma Surgeries can be accessed on PubMed here, here, here, and here (for MIGS); and here, here, here and here for conventional glaucoma surgeries ( trabeculectomy, NPDS and tubes/ glaucoma shunts)

Consultation Details for Glaucoma Surgery in Gurgaon

www.drshibalbhartiya.com
 +91 88826 38735

Patient reviews Google Business Profile

Upload your reports for a structured revie

Glaucoma Treatment in Gurgaon

Glaucoma Treatment in Gurgaon: Eye drops, Laser and Surgery Explained by Dr Shibal Bhartiya, a fellowship trained glaucoma specialist.

Glaucoma is a chronic disease. It cannot be cured, but it can be controlled. With the right glaucoma treatment, most patients keep their vision for life. Glaucoma treatment is not one-size-fits-all. The right treatment depends on your glaucoma type, your optic nerve health, your age, your lifestyle, and how fast your disease is progressing. The goal is never just to lower a number, it is to protect the optic nerve over the long arc of your life. This page explains all three treatment options: eye drops, laser, and surgery.

It answers the questions patients most commonly ask about each. If you have been recently diagnosed, or if you are reviewing your current treatment plan, this guide will help you understand your options and what to expect.

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.

Dr Bhartiya performs SLT, laser iridotomy, trabeculectomy, MIGS, and Ahmed Glaucoma Valve implantation, and sees patients from across North India for structured second opinions. She is rated 5 stars across 1,700+ patient reviews on Google. If you have questions about your specific situation, a structured consultation or second opinion can bring clarity.

Unlike a general eye clinic, her consultations focus on individualised target pressure setting, long-term disease trajectory, and treatment decisions that account for your age, lifestyle, and rate of progression: not just your last IOP reading

Q1. I have glaucoma. What are my treatment options?

Your doctor will first perform a test called gonioscopy and other diagnostic tests to determine your glaucoma subtype: open angle or closed angle. This guides all treatment decisions. 

For open-angle glaucoma, treatment usually starts with eye drops to lower eye pressure. Your doctor will monitor their effect over time and adjust as needed. A laser procedure called selective laser trabeculoplasty (SLT) may also be offered, either as a first-line treatment or alongside drops.

For closed-angle glaucoma, a laser procedure called laser peripheral iridotomy (LPI) is the first step. It creates an alternative drainage channel in the iris. Eye drops may be added after.

If drops and laser do not achieve adequate pressure control, particularly in advanced glaucoma or complex subtypes, surgery is recommended. Options include trabeculectomy, minimally invasive glaucoma surgery (MIGS), and tube shunt implants such as the Ahmed Glaucoma Valve.

— Eye Drops —

Q2. What are the common glaucoma medications?

The table below lists the most commonly used glaucoma eye drops. This is not an exhaustive list. Your doctor will prescribe what is most appropriate for your eye pressure, general health, and lifestyle, and customise your glaucoma treatment to best preserve your vision long term.

Class

Drug Name

Action

Half-life

Dosage

Brand Names (India)

Prostaglandin Analogues

Latanoprost

Outflow

Long

Once at bedtime

Xalatan, Latoprost RT
 

Travoprost

Outflow

Long

Once at bedtime

Travatan
 

Bimatoprost

Outflow

Long

Once at bedtime

Lumigan

Beta Blockers

Timolol

Inflow

Moderate

Twice daily

Iotim, Glucomol, Timolol GFS
 

Levobunolol

Inflow

Moderate

Twice daily

Betagan
 

Betaxolol

Inflow

Moderate

Twice daily

Betoptic

Alpha Agonists

Brimonidine

Inflow / Outflow

Moderate

Three times daily

Alphagan

Carbonic Anhydrase Inhibitors

Acetazolamide (tablet)

Inflow

Short

Three times daily / SOS

Diamox, Iopar SR
 

Dorzolamide

Inflow

Shorter

Three times daily

Dorzox
 

Brinzolamide

Inflow

Shorter

Twice daily

Azopt

Miotics

Pilocarpine

Outflow

Short

Three times daily

Pilocarpine

Q3. My eye pressure is normal after medication. Do I still need to take my drops?

Yes, always. Your eye pressure is normal because the drops are working. If you stop, the pressure will rise again within days.

Think of glaucoma like high blood pressure or diabetes. Medication controls the condition; it does not cure it. Stopping glaucoma treatment puts your vision at risk.

Important to Understand: What is my target eye pressure?

Target IOP is the pressure level that will keep your specific optic nerve stable over your lifetime. It is not the same for every patient. Someone with early glaucoma and a healthy nerve may have a target of 18 mmHg. Someone with advanced damage may need a target below 12. Your target is set based on your optic nerve, your rate of progression, your age, and your individual risk. It changes over time as new information comes in.

If your glaucoma continues to progress despite drops, laser or surgery may be the next step.

You can read one of my research papers on this topic, indexed on Pubmed, on New perspectives on target intraocular pressure , which I co-authored with my colleagues from Sydney Eye Hospital, Sydney, Australia; The University of Sydney, Sydney, Australia; and Department of Clinical Neurosciences, University of Geneva, Switzerland.

Q4. Can I switch to a generic medicine?

Sometimes, but not automatically. A generic can differ from the original in preservative, bottle and drop size, so tell me before any switch. Read more: Generic vs Branded Glaucoma Eye Drops.

However, equivalence in eye drops is harder to guarantee than with tablets, because blood levels cannot be monitored. Small differences in preservatives, drop size, or packaging can affect how well the drop is absorbed and how comfortable it feels.

Discuss any switch with your doctor. If your eye pressures remain stable and the drop is comfortable, a generic may be a reasonable, cost-effective option for glaucoma treatment.

You can read one of my research papers, indexed on Pubmed, on comparative evaluation of pharmaceutical characteristics of three marketed generic vs branded travoprost formulations , which I co-authored with my colleagues from AIIMS, New Delhi which discusses this topic.

Q5. What are the side effects of glaucoma eye drops?

Patients often ask me about Glaucoma Eye Drop Side Effects: What to Expect? Almost all glaucoma drops can cause some eye dryness or local irritation. Allergic reactions are possible with any medication. Specific side effects by drug class include:

  • Prostaglandin Analogues: Darkening of iris or eyelid skin (especially with light eyes), redness, stinging, blurred vision, growth of eyelashes.
  • Beta Blockers: Slowed pulse, fatigue, shortness of breath (particularly in asthma patients), reduced libido, low mood.
  • Alpha Agonists: Stinging, fatigue, headache, drowsiness, dry mouth and nose.
  • Carbonic Anhydrase Inhibitors (eye drop): Stinging, altered taste.
  • Carbonic Anhydrase Inhibitors (oral tablet): Tingling in hands and feet, stomach upset, confusion, low mood, metabolic imbalances.

Note: Preservative Free Glaucoma Eye drops

Most standard glaucoma drops contain a preservative called BAK (benzalkonium chloride). BAK keeps the bottle sterile, but it also irritates the surface of the eye. Used daily for years, it can cause chronic dry eye, redness, and a condition called ocular surface disease.

This matters more than most patients realise. If your eyes are constantly irritated, you are less likely to use your drops consistently. And inconsistent drops mean uncontrolled pressure.

Preservative-free formulations of most common glaucoma medications now exist, including prostaglandins, beta blockers, and fixed combinations. They cost more, but for patients on long-term treatment, or those already prone to dry eye, they are often the right choice.

If your eyes feel persistently dry, red, or irritated on your current drops, tell your doctor. It may not be the medication itself, it may be the preservative. Switching formulation is a simple change that can make a significant difference to both comfort and adherence.

📌 Always tell your doctor if you experience new symptoms. Many side effects can be managed by switching to a different class of drop. A second opinion may help if you are struggling.

Q6. How do I put in my eye drops correctly?

Follow your doctor’s instructions on dose and timing. These steps help ensure the drop reaches the eye and stays in:

  1. Wash your hands before you begin.
  2. Tilt your head back while seated, or lie down.
  3. Gently pull your lower lid down with one finger to form a small pocket.
  4. Look up and squeeze one drop into the pocket. Avoid touching the dropper tip to your eye or hand.
  5. Close your eyes for two minutes. Press gently on the inner corner of the closed eye with your fingertip, this reduces absorption into the bloodstream.
  6. If you use more than one type of drop, wait five minutes between each.
  7. Blot any excess from around the eye with a clean tissue.

📌 If your hands shake, rest your hand against your face and approach from the side. If arthritis makes squeezing difficult, ask your doctor about a bottle-squeezing assistive device.

Q7. I keep forgetting to take my eye drops. What can I do?

You are not alone. Adherence is one of the biggest challenges in glaucoma treatment. Missed drops mean higher pressure and faster disease progression.

Practical strategies that help:

  • Set a recurring alarm on your phone and act on it immediately.
  • Keep your drops on your bedside table and link them to a fixed habit, such as removing your glasses at bedtime. (Note: Xalatan requires refrigeration until opened, after which it can be stored at room temperature.)
  • Download an eye drop reminder app, search ‘eye drop reminder’ on the App Store or Google Play.
  • Ask a family member to remind you, or help you track your drops.
  • Use the same system for scheduling your doctor appointments, a shared calendar or phone reminder works well.

— Laser Treatment —

Q8. I have been advised laser iridotomy. What is that?

A laser peripheral iridotomy (LPI) is used to treat or prevent closed-angle glaucoma. The laser creates a tiny opening in the iris, allowing fluid to flow more freely within the eye and preventing dangerous pressure spikes.

Before the procedure, your doctor will instil drops to make your pupil smaller. A local anaesthetic drop is then applied so you feel no pain. A small lens is placed on your eye to improve visibility, and you are asked to look at a red light while the laser is applied.

Most patients experience mild discomfort, but the procedure is brief. Vision may be blurred for up to three days after. Your doctor will usually prescribe steroid drops for about a week.

Dr Shibal Bhartiya has performed SLT and laser iridotomy in hundreds of patients and integrates laser into the overall treatment strategy based on individual disease profile, not as a reflexive first step.

Q9. I have been advised selective laser trabeculoplasty (SLT). What is that?

SLT is used for open-angle glaucoma. It may be offered as a first option, or in case your glaucoma progresses despite drops. A low-energy laser is applied to the drainage angle of the eye. This stimulates the body’s own immune response to improve fluid outflow and lower eye pressure.

Before the procedure, drops are instilled to constrict the pupil and an eye pressure-lowering agent is given about an hour beforehand. A local anaesthetic drop is applied just before the procedure. You will sit at the laser machine with your face in a chin rest, and a contact lens is placed on the eye, as in a gonioscopy. You may feel a brief twinge or sting as the laser is applied.

Afterwards, you will use anti-inflammatory drops for up to a week. Continue all glaucoma medications as before unless told otherwise. Eye pressure is checked an hour after the procedure and again at one week.

📌 SLT takes one to three months to reach peak effect and may be temporary. Continued follow-up is essential. SLT can often be repeated if the effect wears off.

Not sure whether the surgery recommended for you is the right one? A structured second opinion with Dr Shibal Bhartiya can review your reports and give you clarity

— Surgery —

Q10. What is trabeculectomy? Why might I need it?

Trabeculectomy is the most established glaucoma surgery. It is recommended when eye drops and laser have not adequately controlled your eye pressure, or when glaucoma is advanced at the time of diagnosis.

The surgeon creates a small flap in the white of the eye (sclera) through which fluid can drain out, collecting under the conjunctiva as a small elevation called a bleb. You may be able to see the bleb under your upper eyelid if you look in a mirror.

Trabeculectomy is highly effective in reducing eye pressure, and is the gold standard for surgical glaucoma treatment. It does carry risks, which your doctor will discuss with you before the procedure.

Q11. What is minimally invasive glaucoma surgery (MIGS)?

MIGS is a newer category of glaucoma surgery designed to lower eye pressure with less disruption to the eye than traditional surgery. It is often performed at the same time as cataract surgery.

MIGS procedures include devices such as iStent, Hydrus Microstent, and PRESERFLO MicroShunt. They work by improving drainage through the eye’s natural channels, or by creating a new drainage pathway with less tissue disruption.

MIGS is typically suitable for mild to moderate glaucoma where drops are insufficient or poorly tolerated. It carries a lower risk of complications than trabeculectomy but may produce a more modest pressure reduction.

Dr Shibal Bhartiya offers MIGS as part of a comprehensive glaucoma treatment strategy. If you would like to know whether MIGS is suitable for you, a second opinion consultation can help clarify your options.

Q12. What is an Ahmed Glaucoma Valve?

An Ahmed Glaucoma Valve (AGV) is a small silicone drainage implant placed in the eye to allow fluid to drain to a reservoir under the conjunctiva. It is a type of tube shunt surgery.

Your doctor may also place a small piece of donor sclera (white of the eye) to cover the tube and prevent it from working its way out.

Q13. Why am I getting an Ahmed Valve rather than a trabeculectomy?

Both procedures are proven to be equally effective and safe in the long term. Your doctor will recommend the best option based on your individual history.

An Ahmed Valve is often preferred in the following situations:

  • Previous failed trabeculectomy: a repeat trabeculectomy has a lower chance of success.
  • Certain complex glaucoma subtypes, including inflammatory, neovascular, and post-vitreoretinal surgery glaucomas, or cases with scarred corneas.
  • Your doctor may reserve the Valve as a second-line procedure because of its higher cost.

Q14. What will I feel during surgery?

Surgery sounds frightening. Most patients say the anticipation is far harder than the procedure itself.

Most glaucoma surgeries are performed under local anaesthesia. You will receive an injection around the eye to numb it completely, and an intravenous medication to lower eye pressure before the procedure begins.

You will lie on your back. The area around your eye is cleaned, and a sterile drape is placed over your face. If you feel claustrophobic or are asthmatic, tell your anaesthetist in advance, oxygen can be delivered under the drape.

A small clip keeps the eyelid open so you do not need to worry about blinking. You will see the bright light of the surgical microscope. Your vision will blur as the surgery progresses.

You may feel some pressure or tugging, but surgery is largely painless. Most patients report that the anticipation is worse than the procedure itself. The operation typically takes 45 to 60 minutes. You should be back with family within a couple of hours.

Q15. What is the post glaucoma surgery recovery period like?

Most patients experience a temporary drop in central vision immediately after surgery. This usually recovers within a few weeks. A change in your glasses prescription is common and will be assessed once the eye has stabilised.

Your doctor will see you the day after surgery. You will likely wear an eye patch overnight and have it removed the next morning. Follow-up visits are more frequent in the first few weeks, then become less so as your eye stabilises.

You will be prescribed antibiotic and steroid drops. Some of your glaucoma medications may be continued during the early post-operative period.

Q16. Do I need to restrict activity after surgery?

Gentle walking is encouraged soon after surgery, your doctor will recommend it. For the first week, wear an eye shield at night to protect the eye.

  • Return to desk work: approximately two weeks.
  • Strenuous exercise or weight lifting: avoid for at least one month.
  • Swimming: avoid for at least one month.

📌 Always follow your surgeon’s specific instructions. Recovery timelines can vary depending on the type of surgery and how your eye responds.

Q17. What are the risks of glaucoma surgery?

Your doctor has weighed the risks against the risk of untreated glaucoma progression before recommending surgery. The main risks to be aware of include:

  • Temporary vision drop: Reduced central vision in the early post-operative period due to inflammation, pressure fluctuations, or bleeding. This usually resolves within weeks.
  • Cataract: The risk of cataract development increases after glaucoma surgery, and pre-existing cataract may progress faster.
  • Infection: As with any surgery, there is an increased risk of infection. With trabeculectomy, this risk remains elevated long-term due to the presence of the bleb.
  • Need for additional procedures: A further procedure or surgery may be needed to optimise pressure control.

📌 Knowing the risks allows you to monitor for early signs and report them promptly. Most complications are manageable when caught early.

Read the research articles

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. This article was edited in April 2026.

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.

Available on Pubmed and Google Scholar

Dr Shibal Bhartiya
Glaucoma • Second Opinion • Advanced Care

www.drshibalbhartiya.com
 +91 88826 38735

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