Does Ethnicity Affect Your Risk of Developing Glaucoma?

Yes, ethnicity can affect your risk of developing glaucoma, but it is important to understand this in the right context. Ethnicity is one of several recognised risk factors, and it does not mean that you will definitely develop the condition if you belong to a higher-risk group.

Your overall glaucoma risk is influenced by a combination of factors, including age, family history, eye pressure, corneal thickness, short-sightedness, diabetes, steroid use, and the structure of your eyes. However, research has consistently shown that certain ethnic groups have a higher risk of developing particular types of glaucoma or may experience the condition differently.

Understanding these differences can help guide screening, monitoring, and early detection strategies. The aim is not to cause unnecessary concern, but to ensure that people who may be at higher risk receive appropriate eye care and regular examinations.

This article explains what current research shows about ethnicity and glaucoma, why ethnicity is considered during risk assessment, and what practical steps you can take if you may be at increased risk of developing the condition.

What Is Glaucoma?

Glaucoma is a group of eye conditions that damage the optic nerve, the structure responsible for carrying visual information from the eye to the brain. Because the optic nerve is essential for vision, damage to it can gradually affect how well you see.

In many cases, glaucoma is associated with raised pressure inside the eye, known as intraocular pressure. However, glaucoma can also develop in some people whose eye pressure remains within the normal range, which is why eye pressure alone cannot be used to diagnose or rule out the condition.

One of the biggest concerns with glaucoma is that it often develops slowly and without obvious symptoms in the early stages. Vision changes can be so subtle that many people do not notice a problem until significant optic nerve damage has already occurred, making regular eye examinations important for early detection.

Why Ethnicity Is Discussed in Glaucoma Risk

Ethnicity is discussed in glaucoma research because the condition does not affect all populations in exactly the same way. Some groups have higher rates of primary open-angle glaucoma, while others may have a greater tendency towards angle-closure glaucoma or normal-tension glaucoma.

Research and clinical guidance have shown that people from certain ethnic backgrounds, including African-Caribbean populations, may have a higher risk of developing open-angle glaucoma and may develop the condition at a younger age than some other groups. Understanding these patterns can help guide screening and monitoring recommendations.

However, ethnicity does not act in isolation. Glaucoma risk is influenced by a combination of factors, including genetics, eye anatomy, family history, age, access to healthcare, and other medical conditions. This is why ethnicity should be viewed as one part of a broader risk assessment rather than a predictor of what will happen to any individual person.

Primary Open-Angle Glaucoma and Ethnicity

Primary open-angle glaucoma is the most common type of glaucoma in many parts of the world. It usually develops slowly over many years and often causes no obvious symptoms in the early stages, which means you may not realise there is a problem until vision has already been affected.

Research has consistently shown that people of African ancestry have a higher risk of developing primary open-angle glaucoma compared with people of European ancestry. Studies have also found higher age-adjusted glaucoma prevalence in Black populations, highlighting the importance of awareness, regular eye examinations, and early detection if you belong to a higher-risk group.

Although ethnicity is only one factor that influences your risk, these findings help explain why eye care professionals may recommend closer monitoring for some people. If glaucoma is detected early, treatment can often slow or prevent further damage and help protect your long-term vision.

African and African-Caribbean Backgrounds

People of African and African-Caribbean ancestry have been consistently identified as having a higher risk of developing primary open-angle glaucoma. Research suggests that the condition may develop at a younger age and can sometimes be more advanced by the time it is diagnosed. This makes awareness, regular eye examinations, and early detection particularly important in these communities.

• Higher Risk of Glaucoma: Studies have shown that people of African and African-Caribbean heritage are more likely to develop primary open-angle glaucoma than some other ethnic groups.
• Earlier Onset May Occur: Research suggests that glaucoma can sometimes develop at a younger age in these populations, increasing the importance of regular eye checks.
• Risk of Later Diagnosis: In some cases, the condition may be more advanced when it is first detected, which can affect treatment outcomes.
• Regular Monitoring Is Important: Routine eye examinations can help identify glaucoma earlier and support timely treatment if needed.
• Ethnicity Is Only One Risk Factor: Having African or African-Caribbean ancestry increases risk, but it does not mean you will definitely develop glaucoma.

Overall, ethnicity is one factor that helps eye care professionals assess glaucoma risk, but it is not the only consideration. Many people of African and African-Caribbean heritage never develop the condition. Regular eye examinations remain one of the most effective ways to detect glaucoma early and help protect your long-term vision.

Why Glaucoma May Be More Severe in Some Groups

Research suggests that glaucoma may sometimes be diagnosed later or progress more severely in certain ethnic groups. However, the reasons are complex and are unlikely to be explained by ethnicity alone. Instead, they probably involve a combination of biological, social, environmental, and healthcare-related factors.

For example, some people may have characteristics that influence glaucoma risk, such as thinner central corneas, differences in optic nerve structure, a stronger family history of glaucoma, or other eye-related factors. Access to regular eye examinations, awareness of glaucoma, and how early the condition is detected can also play an important role in long-term outcomes.

This is why it is important not to think about glaucoma risk in terms of ethnicity alone. Your overall risk is usually shaped by several factors working together. Regular eye examinations and a thorough assessment of your individual risk factors are the best ways to support early detection and help protect your sight.

Asian Backgrounds and Glaucoma Risk

If you are of Asian ancestry, it is important to know that you may be at risk of both open-angle glaucoma and angle-closure glaucoma. These are different conditions that can develop in different ways and may require different approaches to monitoring and treatment.

Research has shown that primary angle-closure glaucoma is more common in many Asian populations than in European or African populations, with a large proportion of cases occurring across Asia. Because of this, angle-closure glaucoma has become an important focus of eye health research and screening programmes in many Asian communities.

These findings show that glaucoma risk is not only about whether you may develop the condition, but also about the type of glaucoma you may be more likely to experience. For some people, the structure of the drainage angle inside the eye is particularly important, which is why a comprehensive eye examination may include an assessment of the drainage angle alongside eye pressure measurements and optic nerve checks.

South Asian, East Asian and Angle-Closure Risk

Angle-closure glaucoma occurs when the drainage angle inside the eye becomes narrowed or blocked, preventing fluid from draining properly. This can cause eye pressure to rise and, if left untreated, may lead to optic nerve damage and vision loss.

Research has shown that some South Asian and East Asian populations, including people of Chinese ancestry, may have a higher risk of angle-closure glaucoma than certain other groups. The reasons are thought to be related in part to anatomical differences in the eye, particularly the structure of the drainage angle.

If you come from a background associated with a higher risk of angle closure, your optometrist or ophthalmologist may pay particular attention to the depth of the front chamber of the eye and the appearance of the drainage angle during examination. Identifying a narrow angle early can help guide monitoring and treatment decisions before complications occur.

Normal-Tension Glaucoma in Asian Populations

Normal-tension glaucoma is a type of glaucoma in which damage occurs to the optic nerve even though your eye pressure falls within the range that is usually considered normal. Because many people associate glaucoma with high eye pressure, this form of the condition can sometimes be more difficult to identify without a thorough eye examination.

This type of glaucoma is often discussed in relation to Asian populations because studies have reported a higher proportion of normal-tension glaucoma compared with high-tension glaucoma in some Asian groups. These findings show that glaucoma can present differently in different populations and that risk is not always linked to obviously raised eye pressure.

The key message is that a normal eye pressure reading does not automatically rule out glaucoma. If you are at risk, your optometrist or ophthalmologist will usually look at more than just eye pressure. Examination of the optic nerve, visual field testing, imaging scans, and other clinical assessments all play an important role in detecting glaucoma at an early stage.

Latin American and Hispanic Populations

Glaucoma is also an important eye health concern in Latin American and Hispanic populations. However, risk can vary between different countries, communities, ancestry groups, and levels of access to eye care.

Some research has found that glaucoma prevalence may increase with age in Hispanic and Latin American populations. However, broad labels can sometimes hide important differences between individual groups, so it is important not to assume that everyone has the same level of risk.

The most useful takeaway is that ethnicity should be considered alongside other factors such as age, family history, eye pressure, corneal thickness, diabetes, and overall eye health. If you have concerns about your background or family history, regular eye examinations can help detect early changes before vision is affected.

Mixed Ethnicity and Glaucoma Risk

If you have a mixed ethnic background, your glaucoma risk may not fit neatly into one category. This is because ancestry, genetics, eye structure, lifestyle, and access to healthcare can all influence risk in different ways.

Some studies have found higher glaucoma prevalence in Black and mixed-race populations compared with White populations. However, ethnicity should never be viewed on its own. Your eye specialist will also consider your age, family history, eye pressure, corneal thickness, optic nerve appearance, and overall eye health.

If glaucoma runs in your family, it is worth mentioning this during your eye examination. Sharing your full personal and family history helps your optometrist or ophthalmologist understand your risk more accurately and decide whether closer monitoring is needed.

Ethnicity Is Not the Same as Destiny

Ethnicity can influence glaucoma risk, but it does not determine whether you will develop the condition. Many people from higher-risk ethnic backgrounds never develop glaucoma and maintain healthy vision throughout their lives.

At the same time, glaucoma can affect people from any ethnic group. Factors such as increasing age, raised eye pressure, family history, thinner corneas, diabetes, high myopia, or steroid use can all contribute to risk, regardless of ethnic background.

The safest approach is not to worry unnecessarily about ethnicity, but to recognise it as one of several factors that may affect your eye health. Regular eye examinations remain the best way to detect glaucoma early and protect your vision over the long term.

Family History May Increase Risk Further

Family history is one of the most important risk factors for glaucoma. If your parent, brother, sister, or child has been diagnosed with glaucoma, your own risk may be higher than that of someone without a family history of the condition.

A family history and other recognised risk factors, such as certain ethnic backgrounds, can combine to increase overall risk. This is why eye care professionals routinely ask about glaucoma in close relatives when assessing your eye health.

If glaucoma runs in your family, it is important to tell your optometrist or ophthalmologist, even if your vision currently seems normal. This information can influence how often your eyes are examined and how closely you are monitored for early signs of disease.

Age and Ethnicity Together

Glaucoma risk increases with age, which means age and ethnicity can sometimes combine to increase overall risk. As you get older, regular eye examinations become increasingly important, particularly if you already have other recognised risk factors.

For example, a person of African-Caribbean heritage who is over 40 and has a family history of glaucoma may benefit from especially careful monitoring. Similarly, someone of Asian ancestry who has narrow drainage angles may require closer observation as age-related changes occur in the eye.

The important point is that you do not need to wait for symptoms before having your eyes checked. Glaucoma screening is most valuable when it identifies changes early, before noticeable vision loss has occurred and while there is still an opportunity to protect long-term sight.

Eye Pressure and Corneal Thickness

Raised eye pressure is one of the main treatable risk factors for glaucoma, but it is not the only factor that eye care professionals consider. A pressure reading on its own does not provide a complete picture of your glaucoma risk.

Corneal thickness can influence how eye pressure is measured and interpreted. Thinner corneas are recognised as a glaucoma risk factor and may also affect the accuracy of pressure measurements, making a comprehensive assessment particularly important.

Some research has suggested that differences in central corneal thickness may contribute to variations in glaucoma risk seen between certain ethnic groups. This is one reason why a detailed eye examination, including assessment of the optic nerve and other risk factors, is generally more informative than a simple eye pressure check alone.

Myopia, Diabetes and Other Risk Factors

Ethnicity is only one part of glaucoma risk, and it should always be considered alongside other important factors. Having a particular ethnic background does not mean you will definitely develop glaucoma, just as having no ethnic risk factors does not guarantee protection.

Several other factors can increase the likelihood of glaucoma, including being over the age of 40, having a first-degree relative with glaucoma, thinner corneas, high myopia (short-sightedness), diabetes, high blood pressure, or a history of steroid use. These factors can influence how closely your eye health needs to be monitored.

If you have more than one risk factor, your optometrist or ophthalmologist may recommend more frequent eye examinations and monitoring. Regular follow-up can help detect changes early and reduce the risk of vision loss from undiagnosed glaucoma.

Why Early Detection Matters

Glaucoma-related vision loss is usually permanent. Once damage has occurred to the optic nerve, treatment cannot normally restore the vision that has already been lost, which is why prevention and early diagnosis are so important.

The main aim of glaucoma treatment is to detect the condition as early as possible, reduce eye pressure when needed, and slow or prevent further damage. This is particularly important for people who have risk factors that increase their likelihood of developing glaucoma.

One of the challenges with glaucoma is that early stages often cause no obvious symptoms. Regular eye examinations provide the best opportunity to identify changes before they begin to affect your vision or daily activities.

What Tests Can Help Detect Glaucoma?

Glaucoma is usually detected through a combination of eye tests rather than a single examination. These tests help assess the health of your optic nerve, measure eye pressure, and identify any early signs of vision loss. If you are from a higher-risk ethnic group or have other glaucoma risk factors, regular testing can be especially important.

• Eye Pressure Measurement: This test checks the pressure inside your eye, which is an important glaucoma risk factor.
• Optic Nerve Examination: Your eye specialist will examine the optic nerve for signs of damage that may suggest glaucoma.
• OCT Scans: Optical coherence tomography (OCT) creates detailed images of the optic nerve and retinal nerve fibre layer.
• Visual Field Testing: This test checks for areas of vision loss that may occur as glaucoma progresses.
• Corneal Thickness and Drainage Angle Assessment: These tests provide additional information about your eye structure and glaucoma risk.

Overall, glaucoma testing helps build a detailed picture of your eye health and allows problems to be detected as early as possible. The specific tests you need will depend on your individual risk factors and examination findings. Early assessment and regular monitoring can help identify glaucoma before significant vision loss occurs.

Ethnicity and Access to Eye Care

Ethnicity can sometimes overlap with access to healthcare and eye screening services. Depending on where you live and your circumstances, factors such as lower screening rates, delayed diagnosis, language barriers, financial challenges, or reduced awareness of glaucoma may affect how quickly the condition is identified and treated.

This is particularly important because glaucoma often develops without noticeable symptoms in its early stages. If you are not having regular eye examinations, the condition may only be detected after some vision has already been affected. Unfortunately, glaucoma-related vision loss is usually permanent, making early detection especially valuable.

Improving awareness, encouraging routine eye tests, and making eye care services more accessible are important steps in reducing avoidable sight loss. If you know that you belong to a higher-risk group or have other glaucoma risk factors, attending regular eye examinations can help ensure that any problems are identified as early as possible.

What You Can Do If You Are at Higher Risk

If you know you are at higher risk of glaucoma, the most important step is to attend regular eye examinations. Do not wait until you notice blurred vision, eye discomfort, or other symptoms, as glaucoma often develops without obvious warning signs in its early stages.

You should also tell your optometrist or ophthalmologist about any relevant risk factors, including your ethnic background, family history of glaucoma, diabetes, high myopia, steroid use, or previous concerns about raised eye pressure. These details help them assess your risk more accurately and decide how closely you should be monitored.

Regular monitoring makes it easier to detect changes early and begin treatment if needed. If you are concerned about your glaucoma risk, a specialist consultation can help you discuss screening, diagnosis, monitoring, and treatment options that are appropriate for your individual circumstances.

How Often Should You Have Eye Tests?

The right testing frequency depends on your age, risk factors, family history, and previous eye examination results. Some people may only need routine eye tests, while others may benefit from more frequent monitoring to check for early signs of glaucoma.

If you are over 40, belong to a higher-risk ethnic group, or have a close relative with glaucoma, it is worth discussing your testing schedule with your optometrist. They can assess your individual risk and recommend how often you should be examined.

The most important factor is consistency. Glaucoma monitoring works best when eye pressure, optic nerve appearance, and visual field results can be compared over time, making it easier to identify subtle changes before significant vision loss occurs.

FAQs

1. Does ethnicity really affect glaucoma risk?
   Yes. Research shows that ethnicity can influence the likelihood of developing certain types of glaucoma. However, it is only one of several risk factors, alongside age, family history, eye pressure and overall eye health.
2. Which ethnic groups are at higher risk of glaucoma?
   People of African and African-Caribbean ancestry have a higher risk of primary open-angle glaucoma, while many Asian populations have a higher risk of angle-closure glaucoma. These risks vary depending on genetics, eye structure and other health factors.
3. Does having higher risk mean I will definitely get glaucoma?
   No. Higher risk does not mean you will develop glaucoma. Many people in higher-risk ethnic groups never develop the condition. It simply means regular eye checks are more important.
4. Why are African-Caribbean people at higher risk of open-angle glaucoma?
   The exact reasons are not fully understood, but research suggests a combination of genetic factors, optic nerve structure differences and possible variations in eye pressure response may contribute.
5. Why are Asian populations more associated with angle-closure glaucoma?
   Some Asian populations are more likely to have eye anatomy features such as a shallower anterior chamber, which can narrow the drainage angle and increase the risk of angle-closure glaucoma.
6. Can glaucoma affect people with normal eye pressure?
   Yes. This is known as normal-tension glaucoma. It is more commonly reported in some Asian populations, where optic nerve damage can occur even without raised eye pressure.
7. Is family history more important than ethnicity?
   Family history is one of the strongest risk factors. According to the College of Optometrists, having a first-degree relative with glaucoma significantly increases risk and should always be reported during eye tests.
8. Can glaucoma be prevented if I’m in a high-risk group?
   Glaucoma cannot always be prevented, but early detection and treatment can greatly reduce the risk of vision loss. Regular eye examinations are the most effective way to protect sight.
9. What eye tests are used to detect glaucoma early?
   Eye pressure checks, optic nerve imaging (OCT), visual field tests, corneal thickness measurements and drainage angle assessment are commonly used. These help detect glaucoma before symptoms appear.
10. How often should I get my eyes checked if I’m higher risk?
    It depends on your individual risk profile. The Royal College of Ophthalmologists recommends more frequent monitoring for people with higher risk factors such as African-Caribbean ethnicity, family history or raised eye pressure.

Final Thoughts: Why Understanding Glaucoma Risk Factors Matters

Glaucoma is a complex eye condition, and while ethnicity can influence risk, it is only one part of a much wider picture that includes age, family history, eye pressure, and overall eye health. The most important takeaway is that higher risk does not mean certainty, but it does mean being more proactive with regular eye examinations and early detection.

Protecting your vision is all about awareness and timely care. Whether you have concerns due to your family history, ethnic background, or other risk factors, consistent monitoring can make a significant difference in preventing avoidable sight loss. If you’d like to find out whether glaucoma treatment in London is suitable for you, feel free to contact us at Eye Clinic London to arrange a consultation.

References:

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2. Zukerman, R., Harris, A., Vercellin, A.V., Siesky, B., Pasquale, L.R. and Ciulla, T.A. (2020) Molecular genetics of glaucoma: subtype and ethnicity considerations, Genes, 12(1), 55.
   Available at: https://pubmed.ncbi.nlm.nih.gov/33396423/
3. Weinreb, R.N., Aung, T. and Medeiros, F.A. (2014) The pathophysiology and treatment of glaucoma: a review, 311(18), pp. 1901–1911.
   Available at: https://www.sciencedirect.com/science/article/abs/pii/S0378512222000950
4. Salowe, R., Williams, A.M., Akono, M.O., et al. (2015) Primary Open-Angle Glaucoma in Individuals of African Descent: A Review of Risk Factors, Journal of Clinical & Experimental Ophthalmology, 6(4). Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC4671514/
5. Medeiros, F.A., Weinreb, R.N. and colleagues (2021) Glaucoma Treatment Outcomes in Open-Angle Glaucoma Patients of African Descent, Journal of Glaucoma, 31(7), pp. 497–507.
   Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC9246921/