The staff are really kind and helpful. Dr. Deena Tailor is the best doctor. Very knowledgeable, hears every issue. Will definitely recommend The Eye Center.
— Faisal Sakhi
How to Spot the Early Signs of Glaucoma
Early Warning Signs and Symptoms to Watch For
Glaucoma is often called the silent thief of sight because most of its early changes go unnoticed without a formal exam. Even so, there are subtle signs worth paying attention to between visits.
The earliest vision changes from glaucoma usually affect peripheral vision, meaning the edges of what you can see. You might bump into objects more often, miss people approaching from the side, or feel less confident navigating busy spaces. These changes happen so slowly that many people assume they are simply being less attentive or are experiencing normal aging.
If you cover one eye and notice that your side vision seems more limited than the other eye, that is worth mentioning at your next visit. Because glaucoma often affects both eyes at different rates, the comparison is not always reliable, but any concern is worth raising.
Some people with early glaucoma notice that it takes longer than usual for their eyes to adjust when moving from a bright area into a dark room. You might hesitate at the top of a dim stairway or feel uncertain about your footing in a poorly lit restaurant.
While this can be a normal part of aging, it can also signal early optic nerve changes and is worth mentioning during your exam. Tracking when and how often this happens can help your eye doctor determine whether it is a pattern worth investigating.
Seeing rainbow-colored rings or halos around streetlights or headlights at night can be a warning sign, particularly if it is a new experience for you. This can occur when elevated eye pressure affects the cornea, the clear front surface of the eye.
It is important to note that halos are also commonly caused by cataracts, dry eyes, or certain medications. If halos are accompanied by eye pain, redness, and nausea, that combination signals a possible angle-closure attack and requires urgent care right away.
Sudden, severe eye pain along with redness, rapidly blurred vision, and nausea is a medical emergency that may signal acute angle-closure glaucoma. Permanent vision loss can occur within hours without prompt treatment. The pain is often intense and may come with a severe headache and halos around lights.
- Sudden intense eye pain
- Severe headache
- Nausea or vomiting
- Blurred vision that develops rapidly
- Red eye with a cloudy or hazy cornea
- A pupil that does not respond normally to light
If these symptoms occur after hours, go directly to the nearest emergency department rather than waiting for a scheduled appointment.
The vast majority of glaucoma cases are discovered during routine eye exams in patients who had no complaints at all. If you fall into a high-risk category, the absence of symptoms should not provide false reassurance. We recommend that all adults have a baseline glaucoma evaluation by age 40, with more frequent exams if risk factors are present.
Risk Factors That Increase Your Chances of Glaucoma
Some risk factors for glaucoma are built into your biology, while others relate to your health history and habits. Knowing which ones apply to you helps guide how closely we monitor your eyes over time.
Your risk of glaucoma increases significantly after age 60 and continues to climb with each passing decade. However, certain forms of the disease can develop earlier, particularly in people with a strong family history. If a parent or sibling has glaucoma, your risk is substantially higher than someone with no family history.
Because genetics play such a strong role, we encourage patients with a glaucoma diagnosis to share that information with siblings and adult children so they can be screened earlier and more frequently.
Elevated pressure inside the eye is one of the most important risk factors for developing glaucoma, though some people develop the disease with completely normal pressure levels. We measure eye pressure during your exam using a technique called tonometry, which may involve a gentle puff of air or a probe that touches the eye surface after numbing drops.
Corneal thickness also matters. A thinner-than-average cornea can make the eye more vulnerable to pressure-related damage and may cause pressure readings to appear lower than they actually are. We measure corneal thickness as part of a comprehensive glaucoma evaluation to make sure we interpret your pressure readings accurately.
Several general health conditions are associated with a higher likelihood of developing glaucoma. Diabetes affects blood flow to the optic nerve and raises your risk for multiple eye diseases. High blood pressure, heart disease, migraine headaches, and low blood pressure have also been linked to glaucoma, particularly a form called normal-tension glaucoma where damage occurs even without elevated eye pressure. Obstructive sleep apnea has been associated with increased glaucoma risk as well.
- Diabetes or prediabetes
- High blood pressure
- Heart disease or poor circulation
- Severe migraine headaches
- Obstructive sleep apnea
- Low blood pressure, especially during nighttime hours
People of African descent face a significantly higher risk of open-angle glaucoma and tend to develop it earlier and with more rapid progression. Hispanic individuals also have elevated risk, particularly after age 60. People of Asian descent have a higher risk of angle-closure glaucoma compared to other groups.
These differences directly guide our screening recommendations. If you belong to a higher-risk group, we may begin monitoring earlier and schedule exams more frequently to stay ahead of any changes.
Trauma to the eye can damage the drainage system and lead to glaucoma months or even years after the original injury occurred. This is why we always ask about any eye injury history during your evaluation. Long-term use of steroid medications, whether in the form of eye drops, pills, inhalers, nasal sprays, or skin creams, can raise eye pressure and increase glaucoma risk.
If you use steroid medications regularly for conditions like asthma, arthritis, or skin problems, let us know so we can monitor your eye pressure more closely and coordinate with your other providers when appropriate.
How We Test for Glaucoma
A comprehensive glaucoma evaluation involves several tests, each measuring a different aspect of your eye health. Our team uses advanced computerized glaucoma testing to give us the most complete picture possible.
Measuring the pressure inside your eye is a core part of every glaucoma screening. We use a technique called tonometry, which may involve a quick puff of air or a gentle probe applied to your eye after numbing drops are placed. Higher pressure can indicate increased risk, though some people with glaucoma have normal pressure and some people with elevated pressure never develop the disease.
Pressure naturally varies throughout the day, so we interpret a single reading in the context of your full evaluation. We may ask you to return at different times of day for additional measurements if your readings raise concern.
Examining the optic nerve is the most critical part of a glaucoma evaluation. We use a specialized microscope and light to look at the optic nerve at the back of the eye, which requires dilating your pupils so we have a full and clear view. A healthy optic nerve has a characteristic shape and color, while a nerve affected by glaucoma shows thinning of the nerve tissue and changes in the ratio between the cup and the disc, which are distinct structural landmarks on the nerve.
We photograph the optic nerve to document its appearance over time. Comparing images from year to year allows us to detect subtle structural changes that could indicate early damage or progression.
Using a small mirrored contact lens placed gently on the eye, we examine the drainage angle, the area where fluid exits the eye. This test, called gonioscopy, helps us distinguish between open angles and narrow or closed angles, and it can reveal secondary causes of elevated pressure such as pigment buildup or other structural changes.
This examination is essential for accurately diagnosing angle-closure risk and for choosing the treatment approach that is right for your specific type of glaucoma.
A visual field test measures your complete range of vision, including your peripheral sight. During this test, you look straight ahead and press a button each time you see a small light flash somewhere in your side vision. The test produces a map that shows any areas where your vision is reduced or missing.
This is one of the most important tools for detecting early glaucoma damage and for tracking whether treatment is working over time. We typically repeat visual field testing every six to twelve months for patients with glaucoma or elevated risk, adjusting that frequency based on your individual circumstances.
Optical coherence tomography, commonly called OCT, uses light waves to produce detailed, cross-sectional images of the retina and optic nerve. These images allow us to precisely measure the thickness of the nerve fiber layer surrounding the optic nerve. Thinning of this layer is an early sign of glaucoma damage, and OCT can detect it before changes appear on a visual field test.
- OCT scans measure nerve fiber layer thickness with high precision
- Images are compared against a database of healthy eyes at the same age
- Baseline scans are taken early so we can track changes over time
- Trend analysis helps us identify true progression beyond normal test variability
We measure corneal thickness using a quick, painless test called pachymetry. A thinner-than-average cornea is an independent risk factor for glaucoma and can also affect the accuracy of pressure readings. If your corneas are thinner than average, we adjust how we interpret your eye pressure numbers to ensure we are not underestimating your true risk.
This measurement is typically performed once during your initial glaucoma evaluation and does not need to be repeated at every follow-up visit.
Treatment Options to Protect Your Vision
The goal of glaucoma treatment is not to restore lost vision but to protect the vision you still have by keeping eye pressure at a safe level. Treatment plans are customized based on your glaucoma type, disease severity, and how your eyes respond over time.
Most patients begin treatment with prescription eye drops that lower eye pressure either by reducing fluid production inside the eye or by improving how fluid drains out. These medications are highly effective when used exactly as prescribed. We may prescribe one type of drop or a combination, depending on your target pressure range and your response to treatment.
Consistency matters more than almost anything else with glaucoma drops. Skipping doses or stopping the medication because you feel fine can allow pressure to rise again and allow further irreversible damage to occur. Using your drops at the same time each day makes it easier to stay on track.
Selective laser trabeculoplasty, known as SLT, uses gentle laser energy to improve drainage through the eye's natural channels. It can be used as an initial treatment for open-angle glaucoma or as an option when drops are insufficient or difficult to use consistently. The procedure is performed in our office, takes only a few minutes, and involves minimal discomfort. Its effect typically lasts several years and can be repeated if needed.
For angle-closure glaucoma, a different procedure called laser peripheral iridotomy creates a small opening in the iris to allow fluid to flow more freely and can prevent future closure attacks. Depending on your individual anatomy, removing a cataract may also widen the drainage angle and be recommended as part of your treatment plan.
If eye drops and laser treatment do not adequately control your pressure, surgery may be necessary to protect your optic nerve. Traditional procedures such as trabeculectomy or drainage implants create new pathways for fluid to leave the eye and can achieve significant pressure reduction. Minimally invasive glaucoma surgery, referred to as MIGS, uses small devices to improve drainage with less risk and faster recovery, and is typically performed at the time of cataract surgery for patients with mild to moderate disease.
The decision about whether MIGS or another surgical approach is right for you is made in careful consultation with your surgeon based on your full clinical picture. Our team's goal throughout every stage of treatment is to preserve as much useful vision as possible.
Daily Habits and Follow-Up Care for Glaucoma
Living with glaucoma requires ongoing attention, both in our office and at home. The steps you take between visits are just as important as the treatment we provide during them.
The way you apply your eye drops affects how well they work. After placing a drop in your eye, gently close your eye and press softly on the inner corner for one to two minutes. This keeps the medication from draining through your tear duct and helps more of the medicine stay where it is needed.
- Wash your hands before handling your drops
- Tilt your head back and gently pull down your lower eyelid
- Look up and squeeze one drop into the pocket formed by the eyelid
- Close your eye gently and press on the inner corner for one to two minutes
- Wait at least five minutes before using a second type of drop
Regular monitoring is essential because glaucoma can progress even while you are on treatment. We need to check your pressure, examine your optic nerve, and repeat visual field tests to confirm that your current plan is working. Missing appointments can allow damage to advance undetected.
Depending on the severity of your glaucoma and how well it is controlled, we may schedule follow-up visits every three to six months. If we adjust your treatment, we may want to see you sooner to evaluate the new plan's effectiveness.
Pay attention to any changes in your vision between appointments. You can check each eye separately by covering one eye and noticing how far to the side you can see while looking straight ahead. If you notice new areas of missing side vision, increased blurriness, or sudden vision changes, contact our office right away rather than waiting for your next scheduled visit.
Some patients find it helpful to keep a brief journal of any vision changes or difficulties they notice day to day. This kind of record can help us determine whether your treatment plan needs adjustment. Home checks are a useful supplement to professional testing but do not replace it.
While lifestyle changes alone cannot control glaucoma, certain habits may support your overall eye health alongside medical treatment. Regular moderate exercise can help lower eye pressure in some people. Eating a diet rich in leafy greens and omega-3 fatty acids may support optic nerve health as well.
Staying hydrated is good practice, but drinking large amounts of fluid all at once can temporarily raise eye pressure. Sipping water steadily throughout the day is better than consuming large volumes at one time. If you have obstructive sleep apnea, using your prescribed CPAP therapy as directed is important, since untreated sleep apnea has been linked to increased glaucoma risk. Avoid prolonged head-down positions and heavy lifting with breath-holding, which can temporarily elevate eye pressure.
Contact our office immediately if you experience sudden vision loss, severe eye pain, an intense headache accompanied by nausea, or sudden new light flashes or floaters. These symptoms could signal an acute angle-closure attack or another serious condition that requires same-day evaluation.
If severe pain, nausea, and rapidly blurred vision occur after hours, go to the nearest emergency department rather than waiting. Never stop using your glaucoma medications without speaking with us first, even if side effects are bothering you. We can usually adjust your regimen or switch you to a different medication.
Frequently Asked Questions
These answers address common questions that go beyond what is covered above, including how to make practical decisions about your care and when to take action.
Yes, and it is more common than many people realize. A condition called normal-tension glaucoma causes characteristic optic nerve damage and visual field loss even when pressure measurements are within the normal range. This is one of the reasons we do not rely on pressure testing alone. A complete evaluation that includes optic nerve imaging and visual field testing gives us a far more accurate picture of your true risk.
Most people with glaucoma do not go completely blind, particularly when the disease is caught early and managed consistently. With appropriate treatment and regular monitoring, it is usually possible to slow or halt progression and protect useful vision for many years. The risk of severe vision loss rises significantly when glaucoma goes undetected for a long time or when treatment is inconsistent, which is why attending every follow-up appointment matters so much.
Unfortunately, damage to the optic nerve from glaucoma is permanent. There is currently no treatment that can restore vision that has already been lost. This reality underscores why we place so much emphasis on early detection, because protecting the vision you have now is the only reliable strategy. Treatment is highly effective at preventing further loss when started before significant damage has occurred.
Adults with no risk factors should have a comprehensive eye exam including glaucoma screening starting around age 40, with the frequency increasing as you get older. If you have risk factors such as a family history of glaucoma, thin corneas, elevated eye pressure, or belong to a higher-risk ancestry group, we may recommend starting screenings earlier and scheduling them more frequently. The right interval for you depends on a combination of your risk level, your results over time, and your eye doctor's clinical judgment.
Currently, no supplement has been shown to prevent glaucoma or reliably stop its progression. A diet rich in fruits, vegetables, and omega-3 fatty acids supports general eye health, but it is not a substitute for prescribed medical treatment or regular exams. Always let us know what supplements you take, since some may interact with glaucoma medications or affect how we interpret your test results.
They are completely separate conditions, though it is possible to have both at the same time. Cataracts cause clouding of the natural lens inside the eye, leading to blurry or hazy vision that can often be corrected with surgery. Glaucoma damages the optic nerve and causes irreversible vision loss that surgery cannot undo. Both become more common with age, and their treatments are entirely different, which is why a thorough eye exam distinguishes between the two.
Schedule Your Glaucoma Evaluation at The Eye Center
If you are concerned about your glaucoma risk or have noticed any changes in your vision, we encourage you to schedule a comprehensive exam with our team. The Eye Center has been caring for patients across Northern Virginia since 1989, and our advanced computerized glaucoma testing helps us detect this disease at its earliest and most treatable stage. Protecting your sight starts with a conversation, and we are here to guide you every step of the way.