Difficulty seeing at night, even with “normal” tests, can be an early, often missed signal of underlying eye disease. Clear vision isn’t always safe vision; subtle changes in low light deserve a closer, expert look, explains Dr Shibal Bhartiya.
Difficulty seeing at night is not just an inconvenience. It is often the first sign that something is wrong inside your eye. If you strain to read road signs after dark, feel blinded by oncoming headlights, or need more time to adjust when you walk into a dimly lit room, your eyes are asking you to pay attention.
Many people live with night vision problems for years before seeking help. By the time they do, a treatable condition has sometimes become harder to manage. The right time to see a doctor is now, before your symptoms get worse.
Many patients who come to Dr Bhartiya with night vision complaints have never been told that difficulty adjusting to low light is one of the earliest detectable signs of glaucoma, a condition that has no pain, no redness, and no warning until vision is already lost.
An uncorrected or wrongly corrected spectacle power is one of the most common reasons for poor night vision. Myopia (short-sightedness) makes distant objects blur in all lighting conditions, but the effect is far more noticeable at night. An updated prescription often resolves this quickly.
A cataract clouds the natural lens inside your eye. As it thickens, light scatters before it reaches the retina. This causes glare, halos around lights, and reduced contrast — all of which become more pronounced after dark. Cataracts are treatable with surgery, but early detection gives you more options and better outcomes.
Glaucoma damages the optic nerve gradually and silently. One of its earliest and most overlooked signs is difficulty adapting to low light and a narrowing of your side vision. Most people with glaucoma notice nothing unusual until the damage is advanced. Night driving difficulty, bumping into objects in dim light, or needing extra time to adjust when entering a dark room can all be early warnings. Glaucoma cannot be reversed, but it can be stopped — if it is caught in time.
Uncontrolled diabetes damages the small blood vessels in the retina. This affects how the retina processes light, making night vision one of the first things to suffer. If you have diabetes and notice worsening night vision, do not wait.
Vitamin A is essential for producing rhodopsin, the pigment your retina uses to see in dim light. A deficiency, more common in children but possible in adults with certain diets or gut conditions, directly impairs night vision. This is one of the few causes that is fully reversible with the right nutrition.
Retinitis Pigmentosa
This inherited condition progressively destroys the light-sensitive cells in the retina. Night blindness is usually the first symptom, followed slowly by tunnel vision. Early diagnosis allows for monitoring, genetic counselling, and planning.
When Is Difficulty Seeing at Night Serious?
See a doctor promptly if you notice any of the following:
Glaucoma is called the silent thief of sight for a reason. It takes peripheral vision first, the vision you use to see around you, navigate in dim light, and detect movement. By the time central vision is affected, the damage is already severe.
Night difficulty is one of the earliest functional signs of peripheral vision loss. People often blame tiredness, screen exposure, or ageing, and miss what is actually happening to their optic nerve.
OCT scan— provides a detailed cross-section of the optic nerve and retina, detecting changes years before standard tests
This examination takes about 30 to 45 minutes. It is painless. And it could catch a condition that has no symptoms yet.
Frequently Asked Questions
Is difficulty seeing at night always a sign of a serious eye condition?
Not always. A mild refractive error or vitamin deficiency can cause night vision problems that are fully correctable. However, it can also be an early sign of glaucoma, cataracts, or retinal disease — which are serious. The only way to know is a proper eye examination. Do not self-diagnose.
Can difficulty seeing at night be treated?
Yes, in most cases. Treatment depends on the cause. Refractive errors are corrected with updated spectacles or contact lenses. Cataracts are managed with surgery. Glaucoma is treated with eye drops, laser, or surgery to stop progression. The earlier you seek care, the more treatment options are available.
I am 38 and healthy. Do I really need to worry about night vision changes?
Yes. Glaucoma can begin in your 30s, and Indians are at higher risk than many other populations. If your night vision has changed — even slightly — it is worth ruling out the serious causes. An OCT scan and visual field test take less than an hour and can give you complete clarity.
Does using screens at night cause permanent night vision problems?
Screen use causes temporary eye strain and can make it harder to adjust to darkness in the short term. It does not cause permanent night vision damage. However, if you use this explanation to dismiss persistent night vision symptoms, you may delay the diagnosis of something that does need treatment.
How is a glaucoma-related night vision problem different from normal ageing?
Some loss of contrast sensitivity is normal with age. But a progressive change in how quickly your eyes adjust to darkness, or difficulty on the side of your vision in low light, is not simply ageing — it needs investigation. The key question is whether your night vision has changed. If it has, see a specialist.
Book a Consultation
Night vision problems are worth taking seriously. A 45-minute appointment could detect a condition that has no other symptoms — and protect your vision before damage becomes permanent.
Book an appointment with Dr Shibal Bhartiya — Glaucoma Specialist, Gurgaon
She has published peer-reviewed research on glaucoma management, examining how treatment decisions should balance medical evidence, patient preferences, and long-term vision outcomes.
Family History & Glaucoma Screening– My Parent or Sibling Has Glaucoma. Do I Need to Get Tested Too? Short answer, YES. Having a first degree relative with glaucoma: a parent, sibling, or child, raises your lifetime risk of developing the disease by four to nine times compared to someone with no family history, says Dr Shibal Bhartiya.
Your parent or sibling has just been diagnosed with glaucoma. Or perhaps they have had it for years and you are only now realising what that means for you.
You are asking the right question. Most people do not ask it until it is too late. Dr Shibal Bhartiya explains more.
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.
Why Family History Changes Everything in Glaucoma
Glaucoma is not random. It runs in families. Having a first degree relative with glaucoma: a parent, sibling, or child, raises your lifetime risk of developing the disease by four to nine times compared to someone with no family history.
That is not a small increase. That is a fundamental shift in your risk category.
And yet most first degree relatives of glaucoma patients never get tested. They wait for symptoms. Glaucoma does not produce symptoms until significant, often irreversible damage has already occurred. By the time your vision changes, the window for early intervention has often narrowed considerably.
A first degree relative is a parent, sibling, or child: someone who shares approximately 50 percent of your genetic material.
The first degree relative glaucoma risk is well established in research. Studies consistently show that having one affected first degree relative raises your risk of developing primary open angle glaucoma to approximately 1 in 5. Having two affected first degree relatives raises it further.
The risk is highest when the affected relative developed glaucoma before the age of 60, when the disease was severe at diagnosis, or when the relative required surgery rather than drops alone.
First degree relative glaucoma risk is also higher in specific ethnic groups. People of African descent carry a higher baseline risk. In India, primary angle closure glaucoma has a higher prevalence than in Western populations, and this pattern also clusters in families.
Knowing your family history is not just useful. In glaucoma, it is clinically essential.
Does Having a Family History Mean You Will Definitely Get Glaucoma?
No. A family history raises your risk. It does not guarantee disease.
Many people with a strong family history never develop glaucoma. Many develop it only in their seventies or eighties, when treatment is straightforward and vision loss is entirely preventable with monitoring.
What family history means clinically is this: you belong in a higher-risk group that benefits from earlier, more frequent screening for glaucoma. That is all. It is not a sentence. It is a schedule.
Glaucoma Risk Factors Beyond Family History
Family history is the single strongest glaucoma risk factor after age. But it does not act alone. Several other glaucoma risk factors combine with family history to raise your personal risk further.
Age is the most consistent glaucoma risk factor across all populations. Risk rises steeply after 40 and continues to increase with each decade.
Raised eye pressure, also called ocular hypertension, is a major modifiable glaucoma risk factor. Not everyone with high eye pressure develops glaucoma, but the risk is substantially elevated, particularly when combined with family history.
Myopia (near-sightedness) increases glaucoma risk, particularly for primary open angle glaucoma. Moderate to high myopia is an independent glaucoma risk factor.
Thin corneas reduce the accuracy of eye pressure measurements and are independently associated with glaucoma progression risk.
Systemic conditions including diabetes, hypertension, and migraine are associated with higher glaucoma risk in some studies, particularly for normal tension glaucoma.
Previous eye injury or steroid use — whether eye drops, inhalers, skin creams, or oral steroids — can raise eye pressure and trigger steroid-induced glaucoma, particularly in genetically susceptible individuals.
When you combine a family history of glaucoma with one or more of these additional glaucoma risk factors, the case for early screening becomes compelling.
What Does Screening for Glaucoma in Adults Actually Involve?
Screening for glaucoma in adults is not a single test. It is a short, structured examination that covers the four main parameters of glaucoma assessment.
Eye pressure measurement — intraocular pressure is measured using a non-contact tonometer or applanation tonometry. This takes less than a minute. It is painless.
Optic nerve assessment— the ophthalmologist examines the optic disc through a dilated pupil or with specialist lenses. The size, shape, and symmetry of the optic nerve head are evaluated. This is the most important part of any glaucoma screening examination.
Corneal thickness measurement — pachymetry measures corneal thickness, which affects the interpretation of eye pressure readings.
OCT imaging — optical coherence tomography of the RNFL and optic nerve head provides structural data that can detect early glaucoma damage before any symptoms or visual field changes occur. You can read more about what an OCT scan shows and how to interpret your report.
Visual field testing — in higher-risk individuals, a visual field test maps peripheral and central vision to detect any functional loss.
Gonioscopy — in patients where angle closure is suspected, gonioscopy examines the drainage angle of the eye. This is particularly relevant in Indians, where angle closure glaucoma is more prevalent.
A complete screening for glaucoma in adults takes approximately 45 to 60 minutes at a specialist glaucoma clinic, including dilation time.
For most adults with a first degree relative with glaucoma and no other risk factors, screening should begin at 40. Some guidelines recommend starting at 35 in high-risk ethnic groups or when the affected relative had early-onset disease.
For adults with a family history plus additional glaucoma risk factors: high myopia, raised eye pressure found incidentally, or very thin corneas, earlier screening is warranted. In these cases, a baseline examination in the mid-thirties is reasonable.
For adults with no family history and no other risk factors, screening for glaucoma in adults is generally recommended from the age of 40 as part of a routine comprehensive eye examination.
The question is not whether to screen. The question is when to start and how often to repeat.
How Often Should You Be Screened?
Frequency depends on what the first examination shows.
If the first screening is entirely normal: normal eye pressure, healthy optic nerve, normal OCT, annual or biennial review is appropriate for most people in the family history risk group.
If the first screening shows borderline findings: slightly elevated pressure, a suspicious optic disc, or mildly thin RNFL on OCT, more frequent monitoring is needed. Your glaucoma specialist will advise a specific schedule based on your individual findings.
If the first screening confirms early glaucoma, you move from a screening pathway to a treatment and monitoring pathway. Early glaucoma detected through family history glaucoma screening is almost always manageable, and vision loss is highly preventable with timely intervention.
Detecting Glaucoma Early: Why It Matters So Much
Glaucoma destroys retinal nerve fibres. Once those fibres are gone, they do not regenerate. The vision lost to glaucoma does not return.
Detecting glaucoma early changes the entire trajectory of the disease. A patient diagnosed at the very beginning of structural damage, before any visual field loss, has an excellent long-term prognosis with appropriate treatment. A patient diagnosed after significant optic nerve damage faces a harder, narrower path.
The difference between these two patients is often not biology. It is timing. It is whether someone in the family said: you should get checked, and whether the person listened.
Detecting glaucoma early through structured family history screening is one of the highest-value interventions in all of preventive ophthalmology. It costs very little. It changes lives.
What Happens If Glaucoma Is Found?
Finding glaucoma early through family history glaucoma screening is not bad news. It is good news delivered at the right time.
Early glaucoma in a screened patient is almost always managed with eye drops alone. Treatment is started, eye pressure is brought to a safe target, and the optic nerve is monitored regularly. Most patients with early glaucoma, managed well and consistently, never develop significant visual impairment.
The goal of glaucoma treatment is not to cure the disease. It is to slow it so completely that it never affects your quality of life. That goal is realistic. It is achieved every day for patients who are found early.
What changes if glaucoma is found is not your life. It is your schedule, a few extra clinic visits and a bottle of eye drops. That is the trade. For preserved vision over decades, it is a very good trade.
What If the Screening Is Normal?
A normal screening result is genuinely reassuring, but it is not a permanent all-clear.
Glaucoma can develop or progress at any age. A normal result at 40 means you do not have glaucoma now. It does not mean you will never develop it. This is why regular, repeated family history glaucoma screening matters more than a single normal result.
Think of it the way you think of blood pressure checks or dental appointments. A normal result today schedules your next check. It does not cancel all future checks.
A specialist assessment goes beyond a basic eye pressure check. It includes optic nerve imaging, corneal thickness measurement, OCT analysis, and visual field testing, and if indicated, gonioscopy. This gives you a complete, documented baseline against which future examinations can be compared.
Dr Shibal Bhartiya is a fellowship-trained glaucoma specialist and Mayo Clinic Research Collaborator, Clinical Director at Marengo Asia Hospitals, Gurugram. She offers structured glaucoma risk assessments for patients with a family history of glaucoma, including those seeking a second opinion on existing results or diagnoses.
Your parent’s diagnosis is information. It is not fate.
The single most useful thing you can do with that information is act on it early, before symptoms, before damage, before the window narrows.
Glaucoma caught early is a very manageable disease. Glaucoma caught late is a much harder conversation. The difference is often a single timely appointment.
Book one.
Family History as a Glaucoma Risk Trigger, Not a Footnote
A positive family history remains one of the most clinically actionable risk signals in glaucoma, yet also one of the most under-leveraged.
First-degree relatives of patients with glaucoma have a substantially higher lifetime risk (often 3–4× or more), and importantly, may develop disease earlier and with more aggressive trajectories.
Dr Bhartiya’s editorial along with geneticists from AIIMS, New Delhi and Marengo Asia, emphasises on integrating genomics into practice (PMID: 41523176), reinforcing that family history is not merely a background detail but a proxy for inherited susceptibility that should actively trigger structured screening pathways.
In practical terms, this shifts glaucoma care from opportunistic detection to targeted risk-based screening, where identifying and counselling family members becomes a core extension of clinical responsibility, not an optional add-on.
Clinical Reality (Family History & Glaucoma Screening in India)
Family history is one of the strongest risk factors — but often ignored Many patients only realise its importance after damage has already occurred.
Screening is not routine for relatives Unlike diabetes or hypertension, glaucoma screening is rarely proactively advised to family members.
“No symptoms” delays first check High-risk individuals often wait for visual complaints, by which time disease may already be advanced.
Normal eye check-ups may miss early glaucoma Routine vision tests without optic nerve evaluation or fields can miss disease.
Younger family members are often overlooked Screening is delayed until later decades, despite risk beginning earlier.
One normal test gives false reassurance A single normal OCT or pressure reading does not rule out future risk.
What Good Screening Looks Like (If You Have a Family History of Glaucoma)
Early baseline screening — before symptoms Ideally by age 30–40, or earlier if multiple affected relatives.
Comprehensive evaluation, not just vision or pressure Includes optic nerve assessment, OCT, visual fields, corneal thickness.
Risk-stratified follow-up Frequency depends on baseline findings — not “come if needed.”
Risk can begin earlier in those with family history
Screening from 30–40 years or earlier if high risk
Single normal report
“Everything was normal last time”
One test cannot rule out future progression
Periodic follow-up based on risk profile
Family awareness
“No one told my family to get tested”
Screening advice is often not extended to relatives
Proactive, family-based screening approach
Follow-up
“I’ll come back if needed”
Irregular follow-up delays detection of early changes
Structured, risk-based follow-up intervals
Understanding risk
“It’s just genetic, nothing to do now”
Early detection can prevent vision loss
Education + long-term monitoring strategy
Disease perception
“Glaucoma means high pressure only”
Many patients develop glaucoma at normal pressures
Broader risk assessment beyond IOP
Goal of screening
“Just to rule it out”
Screening is about early detection and tracking change
Long-term risk management, not one-time clearance
Frequently Asked Questions: Family History and Glaucoma Screening
Does glaucoma run in families?
Yes. Having a first degree relative: a parent, sibling, or child with glaucoma raises your lifetime risk of developing the disease by four to nine times. Family history is the single strongest glaucoma risk factor after age. Structured family history glaucoma screening is recommended for all first degree relatives of glaucoma patients.
What is the risk of glaucoma if a parent has it?
The first degree relative glaucoma risk is approximately 1 in 5 for primary open angle glaucoma, significantly higher than the general population risk of around 1 in 50. The risk is higher when the affected parent developed glaucoma early, had severe disease, or required surgery.
At what age should I get screened for glaucoma if a parent has it?
Screening for glaucoma early should begin at 40 for most adults with a first degree relative with glaucoma. Those with additional glaucoma risk factors, high myopia, raised eye pressure, or thin corneas, should consider a baseline examination from the mid-thirties.
What does glaucoma screening involve?
Screening for glaucoma in adults includes eye pressure measurement, optic nerve assessment through a dilated pupil, corneal thickness measurement, OCT imaging of the nerve fibre layer, and visual field testing in higher-risk individuals. A complete specialist assessment takes approximately 45 to 60 minutes.
Can glaucoma skip a generation?
Yes. The genetic inheritance pattern of glaucoma is complex and not fully understood. Glaucoma can skip generations or manifest differently across family members. A negative family history in your parents does not fully exclude risk if grandparents or siblings are affected.
What glaucoma risk factors increase my risk beyond family history?
Key glaucoma risk factors that combine with family history include age over 40, raised eye pressure, moderate to high myopia, thin corneas, diabetes, and previous steroid use. The more risk factors present alongside family history, the stronger the case for early and frequent screening.
If my glaucoma screening is normal, do I still need follow-up?
Yes. A normal result at first screening does not mean permanent all-clear. Glaucoma can develop at any point. Annual or biennial review is recommended for adults with a family history of glaucoma, even when the initial assessment is entirely normal.
She has published peer-reviewed research on glaucoma management, examining how treatment decisions should balance medical evidence, patient preferences, and long-term vision outcomes.
Glaucoma in India: Why the Risk Is Higher Than You Think
Glaucoma is the most common cause of irreversible blindness in India, and 90% of cases remain undiagnosed. That means nine out of every ten people with glaucoma in this country do not know they have it. An estimated 11.2 million Indians aged 40 and above have glaucoma. And angle closure glaucoma is more common in India, than in the West, says Dr Shibal Bhartiya. Glaucoma in India is often missed or undertreated because it progresses silently, even when vision and eye pressure appear normal. Good glaucoma care focuses on early detection, risk-based monitoring, and long-term protection of vision, not just adding more eye drops.
Glaucoma does not give you a warning. You lose peripheral vision first. By the time you notice something is wrong, damage is already done. The good news is that glaucoma detected early is highly manageable. Blindness from glaucoma is largely preventable with timely diagnosis and consistent treatment.
In India, this story plays out every day at a scale that is hard to comprehend. Dr Shibal Bhartiya, fellowship trained glaucoma specialist in Gurgaon, explains more about Glaucoma in India, and Indians.
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.
Why Indians Are at Higher Risk
Indians carry specific anatomical and genetic traits that raise their glaucoma risk. One of the most significant is a shallower anterior chamber angle. This makes angle-closure glaucoma far more common in Indian and South Asian eyes than in Western populations.
Primary angle-closure disease may affect as many as 27.6 million Indians. Patients with primary angle-closure glaucoma are twice as likely to go blind compared to those with open-angle glaucoma. Yet this form is frequently missed or misdiagnosed.
Indians also present with glaucoma at a younger age than patients in Western populations. Juvenile open-angle glaucoma, which begins between the ages of 16 and 40, is well documented in Indian tertiary centre data. A family history of glaucoma raises your personal risk significantly. If a parent or sibling has glaucoma, your chances of developing it are much higher.
Other risk factors specific to the Indian context include:
Steroid use without medical supervision, myopia (short-sightedness), diabetes, and a family history of glaucoma are all important risk factors to discuss with your doctor.
The Problem of Late Presentation
Most glaucoma in India is detected late. Very late.
In India, undetected and untreated glaucoma leads to faster progression, earlier visual impairment, and preventable blindness. The core reason is that glaucoma causes no pain and no blur in the early stages. People feel completely fine. They see no reason to visit an eye doctor.
By the time central vision is affected, up to 90% of peripheral nerve fibres may already be lost. That damage cannot be reversed. No surgery, no medication, and no intervention brings that vision back.
Glaucoma prevalence among Indians aged 40 and above ranges between 2.7% and 4.3% across multiple population-based studies. In those over 70 years of age, the risk rises sharply. Studies show glaucoma affects over 8% of Indians in their seventies and over 14% of those above 80.
Glaucoma is a leading cause of irreversible blindness globally, and the burden in Asia and India is expected to grow substantially by 2040.
India does not have enough glaucoma specialists to manage this burden. Most patients are diagnosed and managed by general ophthalmologists. Structured, specialist-led care makes a real difference to outcomes.
What Makes Glaucoma in Indians Different to Manage
Treating glaucoma in an Indian patient requires a different approach than using a standard Western protocol.
Indian eyes tend to have thinner corneas. Corneal thickness affects how accurately we measure intraocular pressure (IOP). A thin cornea can make the pressure appear lower than it actually is. This leads to underdiagnosis and undertreatment. Also, thinner corneas are an independent risk factor for glaucoma progression.
Angle-closure disease needs gonioscopy, a specialised examination to assess the drainage angle of the eye. Studies have found that a significant proportion of patients in India are incorrectly treated for open-angle glaucoma when they actually have angle-closure disease.The treatment for these two types is fundamentally different.
I have spent 25+ years specialising in glaucoma. I see this disease in its full Indian context, not through a textbook written for another population.
My clinical approach includes a full angle assessment with gonioscopy for every new patient, corneal thickness measurement to ensure accurate pressure readings, structural imaging with OCT to detect early nerve fibre loss, visual field analysis (with special emphasis on reliability criteria) and a detailed risk factor review including family history, steroid use, and systemic health.
Correct classification, open-angle versus angle-closure, changes treatment completely. Getting this right at the first visit prevents years of inadequate care.
I also believe in clear communication. Glaucoma is a lifelong condition. You need to understand what you have, why treatment matters, and what to monitor. I take the time to explain this at every visit.
If you have a family history of glaucoma, are over 40, have diabetes, are short-sighted, or use steroid eye drops, you need a glaucoma screening now.
Clinical Reality (What’s Not Always Obvious in Glaucoma Care in India)
Normal vision does not mean no glaucoma Many patients read 6/6 and still have significant optic nerve damage.
Symptoms are often absent until late Glaucoma is typically silent — by the time patients notice vision loss, it is often irreversible.
Eye pressure (IOP) alone is not enough Patients can progress despite “normal” pressures — especially in normal-tension glaucoma, which is common in India.
Tests in isolation can mislead A single OCT or visual field report cannot define disease. Progression over time is what matters.
Cataract and glaucoma often coexist — but are not interchangeable explanations Improving vision after cataract surgery does not mean glaucoma risk is gone.
More medications ≠ better control Multiple drops without a clear long-term plan often reflect escalation without strategy.
Follow-up gaps are a major cause of vision loss Irregular monitoring is one of the biggest real-world failures in glaucoma care.
Family history is under-recognised and under-screened Many high-risk individuals in India are never examined until damage has already occurred.
Early risk identification — even before symptoms Screening is guided by age, family history, corneal thickness, optic nerve appearance — not just complaints.
Baseline documentation and longitudinal tracking OCT and visual fields are used to establish a baseline and detect change, not just diagnose once.
Target pressure is individualised Treatment is tailored based on stage of disease, risk profile, and rate of progression — not a fixed number.
Medication strategy is structured, not reactive Each drop has a purpose. Escalation is thoughtful, not additive.
Patient understanding is prioritised Patients are told what to watch for: subtle visual changes, adherence issues, side effects.
Consistency over intensity Regular follow-up (every 3–6 months depending on risk) matters more than aggressive but irregular care.
Second opinions are used appropriately Especially when:
Disease is progressing despite treatment
Multiple medications are being used
Surgery is being considered
The goal is not just seeing clearly — but seeing safely for life Glaucoma care is long-term risk management, not short-term vision correction.
Remember
Situation
What Patients Often Assume
Clinical Reality (India Context)
What Good Care Looks Like
Vision is normal
“I can see clearly, so everything is fine”
Glaucoma can cause optic nerve damage even with 6/6 vision
Risk-based screening and optic nerve evaluation, even without symptoms
No symptoms
“No discomfort means no disease”
Glaucoma is silent until late stages
Early detection through structured exams, not symptom-driven visits
Eye pressure (IOP)
“My pressure is normal, so I’m safe”
Progression can occur even at normal IOP (common in India)
Individualised target IOP based on risk and progression
Single test reports
“My OCT/field test is normal”
One report is not enough — change over time matters
Baseline + serial comparison to detect progression
Cataract vs glaucoma
“Cataract surgery fixed my vision, so I’m okay”
Cataract improvement can mask underlying glaucoma
Parallel evaluation of optic nerve even in cataract patients
Multiple eye drops
“More drops means stronger treatment”
Overmedication may reflect lack of strategy
Structured medication plan with defined goals
Follow-up gaps
“I’ll come back if I feel a problem”
Irregular follow-up is a major cause of preventable vision loss
Scheduled monitoring every 3–6 months based on risk
Family history
“No one told me to get checked”
High-risk individuals often remain unscreened in India
Proactive screening for family members
Treatment approach
“Doctor will adjust if needed”
Reactive care often misses slow progression
Long-term planning with defined targets and timelines
Understanding disease
“Drops are enough”
Poor understanding leads to poor adherence
Clear patient education on disease, risks, and expectations
Escalation decisions
“Add another drop if pressure rises”
Escalation without strategy leads to confusion and side effects
Stepwise, purpose-driven escalation or de-escalation
Goal of care
“I just need to see clearly”
Vision clarity ≠ visual safety
Focus on lifelong preservation of functional vision
FAQs: Glaucoma in Indians
Is glaucoma more common in Indians?
Yes. Indians face a higher risk than many Western populations for two main reasons. First, Indian eyes tend to have a shallower drainage angle, which makes angle-closure glaucoma significantly more common. Second, glaucoma in Indians often develops at a younger age and is detected later, by which time substantial nerve damage has already occurred.
Can Indians get glaucoma even with normal eye pressure?
Yes. Normal tension glaucoma (NTG) occurs when the optic nerve is damaged despite intraocular pressure readings within the normal range. This form is well documented in Indian patients. It is one reason why pressure measurement alone is not enough. A full glaucoma evaluation includes optic nerve imaging and visual field testing.
What are the early signs of glaucoma in Indians?
In most cases, there are no early signs. Glaucoma is called the silent thief of sight because it causes no pain and no blurred vision until the disease is advanced. Peripheral vision goes first, and most people do not notice this until significant damage has occurred. The only reliable way to detect early glaucoma is a comprehensive eye examination.
Who should get screened for glaucoma in India?
Anyone over 40 should have a baseline glaucoma check. Screening is especially important if you have a family history of glaucoma, are short-sighted, have diabetes, use steroid eye drops, or have previously been told your eye pressure is elevated. Earlier screening is recommended if more than one risk factor applies.
How is glaucoma treated in Indian patients?
Treatment depends on the type of glaucoma. Angle-closure glaucoma, which is more common in Indians, often requires laser treatment (laser peripheral iridotomy) in addition to or instead of eye drops. Open-angle glaucoma is typically managed with pressure-lowering drops, laser, or surgery. The right treatment must be matched to the specific type of glaucoma you have, which is why correct diagnosis through gonioscopy and full assessment is essential.
If you have been told you have glaucoma but have not had gonioscopy or a visual field or OCT imaging, a structured second opinion can clarify your diagnosis and treatment plan.
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 updated in May 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.
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.
Dr Bhartiya, along with her colleagues in Australia and Switzerland, has published peer-reviewed research on current perspectives on Target IOP in glaucoma practice, examining how treatment decisions should balance medical evidence, patient preferences, and long-term vision outcomes. Her 2014 paper, Target Intraocular Pressure: Approaches and Options, examines how glaucoma specialists should set, communicate, and revise pressure targets, balancing clinical evidence, patient preferences, and long-term vision outcomes. It is cited by glaucoma surgeons internationally and is freely available on PubMed.
More drops does not mean better control Adding medications can feel like escalation, but without reassessing the disease, it may not improve long-term outcomes.
A “good” pressure reading can be misleading One normal reading does not guarantee stability—glaucoma damage can continue silently between visits.
Treatment can become habit instead of strategy Over time, care may drift into simply adding or switching drops rather than redefining targets and plans.
Side effects quietly affect outcomes Multiple preserved drops can irritate the ocular surface, making patients less consistent with treatment.
Stable reports don’t always mean stable disease Individual tests may look fine, but progression often appears only when data is tracked over time.
Complex regimens reduce adherence The more complicated the schedule, the harder it becomes to follow consistently—reducing real-world effectiveness.
Escalation is often delayed Laser or surgery may be postponed because “something is being done,” even if it’s no longer enough.
Follow-up gaps change the disease trajectory Longer intervals without structured review can allow subtle progression to go unnoticed.
Targets are not always redefined As glaucoma advances, the required pressure often needs to be lower—but this isn’t always updated.
Activity is mistaken for effectiveness More visits, more drops, more changes—these can create the illusion of control without actually protecting vision.
1. Do more glaucoma eye drops mean better treatment?
No. More drops do not necessarily improve outcomes. Treatment must be tailored to your risk profile and disease progression, not just escalated.
2. How many glaucoma drops are too many?
There is no fixed number, but if you are on 3 or more medications, your treatment strategy should be reviewed for effectiveness, tolerance, and alternatives.
3. Why do glaucoma drops stop working?
Glaucoma may progress despite treatment, or medications may become less effective over time. Poor adherence and incorrect sequencing also play a role.
4. What are the side effects of multiple glaucoma drops?
Common side effects include redness, burning, dryness, allergy, blurred vision, and poor tolerance, especially with long-term use.
5. What is target eye pressure in glaucoma?
Target IOP is the pressure level considered safe for your optic nerve. It varies based on damage, age, and progression risk.
6. Are laser or surgery better than eye drops?
In some cases, yes. If drops are not effective or tolerated, laser or surgery may offer safer long-term control.
7. What are fixed combination glaucoma drops?
These combine two medications in one bottle, helping reduce drop burden, improve compliance, and lower preservative exposure.
8. When should I get a second opinion for glaucoma?
If you are on multiple drops, still progressing, or experiencing side effects, a second opinion can help optimise your treatment plan.
She has published peer-reviewed research on glaucoma management, examining how treatment decisions should balance medical evidence, patient preferences, and long-term vision outcomes.
Untreated glaucoma causes permanent, irreversible vision loss, and in most cases, patients feel nothing until significant damage has already occurred. Glaucoma destroys the optic nerve silently. By the time you notice a change in your vision, up to 40% of nerve fibres may already be gone, explains Dr Shibal Bhartiya.
Many people discover glaucoma late because it causes no pain, no redness, and no early warning signs in its most common form. That silence is what makes it dangerous. If you have been told your eye pressure is high, or if glaucoma runs in your family, the question of what happens if you leave it alone is not academic. It is urgent.
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.
7 Things That Happen When Glaucoma Goes Untreated
1. The Optic Nerve Keeps Deteriorating
Glaucoma damages the optic nerve, the cable that sends visual signals from your eye to your brain. Each day without treatment, elevated pressure continues to compress and starve nerve fibres of blood supply. Once a nerve fibre dies, it does not regenerate. There is no surgery, no medication, and no natural process that restores it.
The first field of vision to go is your peripheral vision, the edges of what you see. This happens so gradually that most patients do not notice. The brain fills in the gaps, masking the loss. You may be losing significant side vision for years before you register anything unusual.
A common misconception is that glaucoma only affects side vision and central vision stays intact. This is true in early and moderate stages, but untreated glaucoma progresses. As more of the optic nerve is destroyed, the visual field loss closes in from the edges toward the centre. At advanced stages, the remaining central tunnel of vision narrows severely.
Glaucoma is the leading cause of irreversible blindness worldwide. It is the number one cause of preventable blindness in India. The word “preventable” matters, because the blindness is not inevitable. It is the outcome of late diagnosis or no treatment.
Not all glaucoma is slow and silent. Acute angle-closure glaucoma is a medical emergency. Eye pressure spikes suddenly and severely. Patients experience intense eye pain, headache, nausea, vomiting, and blurred vision with coloured halos around lights.
If this is not treated within hours, it can cause permanent blindness in that eye. Many patients mistake it for a migraine or food poisoning and delay seeking care. This delay can cost them their sight.
The impact is gradual enough that patients adapt, until they can no longer. At that point, the vision loss cannot be reversed.
7. Treatment Becomes Harder as Damage Advances
In early glaucoma, a single eye drop once daily may be all that is needed to control pressure and preserve vision. As glaucoma advances, more medications are required. Laser treatments may be needed. Surgery, with longer recovery times, higher risks, and no guarantee of reversing existing damage, becomes the only option.
Most patients are told they have high eye pressure or early glaucoma and are given drops. What they are not always told clearly is this: the drops do not make you feel better. They do not improve your vision. They work silently in the background to prevent future damage.
Because there is no immediate reward, no symptom that goes away, no vision that returns, many patients stop their drops after a few weeks. They feel the same. They assume they are fine. This is the most dangerous point in glaucoma care.
Stopping treatment does not mean the disease has stopped. It means the only thing slowing the damage has been removed.
As a glaucoma specialist, I have seen patients who were diagnosed years earlier, given drops, and told to return in six months. Life got busy. The drops ran out. The follow-up did not happen. When they finally return, sometimes years later, significant, irreversible vision loss has occurred in the interval.
Sudden eye pain, nausea, and blurred vision with halos
What This Means for You
Glaucoma is manageable. That is the truth that often gets lost in the fear around the diagnosis. The vast majority of patients who are diagnosed early, treated appropriately, and followed up consistently do not go blind. They live full, visually intact lives.
But glaucoma does not forgive neglect. It does not pause when life gets busy. It does not announce its progress. The only protection is a specialist who checks, measures, and adjusts your treatment over time, and a patient who shows up.
If you have been diagnosed with glaucoma, or if someone in your family has it, a comprehensive glaucoma evaluation is not something to delay. The damage happening right now is silent. The window to prevent it from becoming permanent is open, but it does not stay open forever.
Frequently Asked Questions
Can glaucoma be reversed if caught early?
The nerve damage already present cannot be reversed. However, early treatment stops further damage from occurring. Patients diagnosed early and treated consistently typically keep their functional vision for life.
Is it safe to stop glaucoma drops if I feel fine?
No. Glaucoma drops prevent damage, they do not treat symptoms, because there are none. Feeling well means the drops are working. Stopping them removes the only thing protecting your optic nerve.
How fast does untreated glaucoma progress?
This varies by type and individual. Some patients progress slowly over decades; others, particularly those with very high pressures or angle-closure glaucoma, can lose significant vision within months or years. There is no way to predict your rate without regular monitoring.
What is the difference between glaucoma suspects and glaucoma?
A glaucoma suspect has risk factors: high pressure, suspicious optic nerve appearance, or a family history, but no confirmed nerve damage yet. This group needs careful monitoring, as some will develop glaucoma. Not all glaucoma suspects need treatment, but all need regular follow-up.
Can I drive if I have glaucoma?
In early and moderate glaucoma, most patients can drive safely. In advanced glaucoma with significant peripheral field loss, driving may be unsafe and may not meet legal vision standards. This should be assessed with a formal visual field test.
Should You See a Glaucoma Specialist?
If you have been diagnosed with glaucoma, suspect you may have it, or have a parent or sibling with the condition, a specialist evaluation gives you information a general eye check cannot.
She has published peer-reviewed research on glaucoma management, examining how treatment decisions should balance medical evidence, patient preferences, and long-term vision outcomes.