Always on time, friendly staff, and Dr. Callahan answers all questions clearly. The office is very clean, and several of my family members also go here. An all-around great practice.
Bernadette Amos-Watts
Open-Angle Glaucoma: What Patients Need to Know
Causes and Risk Factors
While the exact cause is not always clear, several factors are known to increase the likelihood of developing open-angle glaucoma. Recognizing these risk factors helps determine how often you should be screened and how closely your eye health should be monitored.
The risk of open-angle glaucoma increases steadily with age. Adults over 60 are at significantly higher risk, though the risk begins to rise as early as age 40 for some groups. If a parent or sibling has been diagnosed with glaucoma, your own risk increases substantially, making family history one of the most important factors your eye doctor will ask about.
Several systemic health conditions can contribute to glaucoma risk by affecting blood flow to the optic nerve. These include diabetes, high blood pressure, and heart disease. Conditions such as sleep apnea have also been associated with glaucoma in some patients. Sharing your full medical history with your eye doctor allows for a more accurate personal risk assessment.
People of African, Hispanic, or Asian descent face a higher risk of developing open-angle glaucoma. African Americans and Hispanics are more likely to develop the condition at a younger age and may experience faster disease progression. Asian populations have higher rates of normal-tension glaucoma specifically. These differences make earlier and more frequent screening especially important for these groups.
Certain characteristics of the eye itself can increase glaucoma risk independently of general health. These include high levels of nearsightedness (myopia), a history of eye injury or inflammation, and thin corneas. Long-term use of corticosteroid medications in any form, including eye drops, oral pills, or injections, can also raise eye pressure and should always be discussed with your eye doctor.
Recognizing the Symptoms
Open-angle glaucoma is often called the 'silent thief of sight' because it causes no pain and very few noticeable symptoms in its early stages. Understanding what to watch for, and when to act quickly, can make a real difference in protecting your vision.
In the earliest stages of open-angle glaucoma, most people feel completely normal. There is no pain, no redness, and no obvious change in how well they can see. This is precisely what makes routine eye exams so important. The disease can be progressing and causing irreversible nerve damage long before any symptom is apparent.
As the disease progresses, the gradual loss of peripheral (side) vision becomes the most noticeable change. Because this happens slowly and the brain adapts to fill in gaps, many patients do not notice it themselves. Over time, people may find themselves bumping into objects, struggling with stairs or curbs, or having more difficulty in low-light environments.
In later stages, the remaining field of vision narrows significantly, creating what is often described as tunnel vision. This can make driving, reading, and navigating busy spaces increasingly difficult. When central vision also becomes affected, it signals substantial and advanced damage to the optic nerve.
While open-angle glaucoma progresses slowly, certain symptoms require immediate attention. Sudden severe eye pain, a rapid loss of vision, nausea, or seeing rainbow-colored halos around lights can indicate a different and more acute type of glaucoma that is a medical emergency. Do not wait for a routine appointment if you experience any of these symptoms.
How Open-Angle Glaucoma Is Diagnosed
Diagnosing open-angle glaucoma involves a series of painless tests performed during a comprehensive eye exam. Together, these tests give your eye doctor a complete picture of your eye pressure, optic nerve health, and visual function.
A test called tonometry measures the pressure inside your eye, known as intraocular pressure (IOP). This can be performed with a brief puff of air or with a small probe that gently touches the eye's surface after numbing drops are applied. It is important to understand that some people develop glaucoma with normal pressure levels, so this test is always interpreted alongside other findings.
Your eye doctor uses magnifying lenses to closely examine the optic nerve for signs of damage. They look for changes in the nerve's size, color, or shape, including a condition called 'cupping,' where the center of the nerve appears more hollowed out than normal. Photographs are often taken during this exam so that subtle changes can be tracked over time.
This test, called perimetry, maps your entire field of vision to identify any blind spots caused by nerve damage. You will look at a screen and respond whenever you see small flashes of light appearing in different areas of your visual field. The resulting map helps your eye doctor monitor whether the disease is stable or progressing.
A procedure called gonioscopy uses a specialized contact lens placed gently on the eye to allow your eye doctor to directly view the drainage angle. This test is essential for confirming that the angle is open, which distinguishes open-angle glaucoma from angle-closure glaucoma and guides treatment decisions.
Pachymetry measures the thickness of the cornea using a gentle ultrasonic probe. Corneal thickness can affect how eye pressure readings are interpreted, so this measurement adds important context to your overall assessment. Optical Coherence Tomography (OCT) is a non-contact imaging technology that produces detailed cross-sectional images of the optic nerve and the surrounding retinal nerve fiber layer. OCT can detect very early, subtle damage before it becomes visible during a standard exam, making it one of the most valuable tools for both early diagnosis and tracking changes over time.
Treatment Options at Our Practice
Treatment for open-angle glaucoma is focused on lowering eye pressure to protect the optic nerve and preserve your existing vision. Our eye doctors take a personalized approach, starting with the most appropriate option for your situation and adjusting your care plan as needed over time. For more complex cases, we coordinate with trusted specialists to ensure you receive the right level of care.
Medicated eye drops are the most common starting point for treatment. They work either by reducing the amount of fluid the eye produces or by helping existing fluid drain more effectively. Several classes of drops may be used, including prostaglandin analogs, beta-blockers, alpha-adrenergic agonists, carbonic anhydrase inhibitors, and rho kinase inhibitors. Consistent, daily use is essential because even short gaps in treatment can allow eye pressure to rise and cause further nerve damage.
Selective Laser Trabeculoplasty, or SLT, is an in-office laser procedure that improves the efficiency of the eye's natural drainage system using gentle, targeted laser energy. SLT can be an effective first-line treatment or a way to reduce or eliminate dependence on daily eye drops. The procedure is quick, causes minimal discomfort, and can be repeated if its effects diminish over time. Many patients find it a convenient and well-tolerated option.
YAG Laser Peripheral Iridotomy (YAG PI) is a laser procedure that creates a small opening in the iris to improve fluid flow within the eye. While it is more commonly used for narrow-angle or angle-closure glaucoma, it may be recommended in certain situations involving open-angle glaucoma to support pressure management. Your eye doctor will determine whether this procedure is appropriate for your specific anatomy and diagnosis.
Minimally Invasive Glaucoma Surgery, known as MIGS, offers meaningful pressure reduction with a faster recovery and a lower risk profile compared to traditional surgical approaches. Our eye doctors perform goniotomy as a MIGS option. Goniotomy involves making a small incision in the trabecular meshwork to improve the outflow of fluid from the eye. This procedure can often be combined with cataract surgery when both conditions need to be addressed at the same time.
For patients with glaucoma that is more advanced or difficult to control, we provide a coordinated referral to trusted specialists. Procedures such as trabeculectomy, which creates a new drainage pathway in the eye, or the placement of more complex drainage implants, may be recommended in these situations. Our team remains involved in your care and monitoring throughout this process.
Living Well with Open-Angle Glaucoma
Managing open-angle glaucoma is a long-term commitment that involves consistent treatment, regular monitoring, and a few supportive lifestyle habits. With the right approach, most people with this condition are able to maintain good vision and continue enjoying their daily lives.
Consistency is the most important factor in successful glaucoma management. If you use eye drops, setting phone reminders or tying the routine to another daily habit, such as brushing your teeth, can help you stay on schedule. If you find it difficult to apply drops correctly, ask your eye doctor or a member of our team to walk you through the proper technique. Never stop or reduce your treatment without first consulting your eye doctor.
No specific diet has been proven to treat glaucoma, but a healthy diet supports overall eye health and general wellbeing. Foods rich in antioxidants, including leafy green vegetables such as kale and spinach, along with colorful fruits, are a good foundation. Omega-3 fatty acids found in fish may also support optic nerve health. Staying adequately hydrated throughout the day is also beneficial, while avoiding large amounts of fluids consumed all at once.
Regular moderate exercise such as walking, swimming, or cycling may help lower eye pressure and support healthy blood flow to the optic nerve. However, some activities should be approached with caution. Heavy weightlifting that involves straining or breath-holding, and yoga positions where your head is below the level of your heart, can temporarily increase eye pressure. Talk to your eye doctor about which activities are safe for your specific situation.
Regular follow-up visits are a critical part of glaucoma management. For patients with an established diagnosis, appointments are typically scheduled every three to six months, depending on how stable the condition is and what treatments are in place. These visits allow your eye doctor to track your visual field, optic nerve appearance, and eye pressure over time, and to adjust your treatment plan if needed. Glaucoma is a lifelong condition, and consistent monitoring is what keeps it under control.
Frequently Asked Questions
Here are answers to some of the most common questions our patients ask about open-angle glaucoma, with guidance to help you navigate decisions about your care.
There is currently no cure for glaucoma, and any vision already lost cannot be restored. However, the goal of treatment is to prevent further loss, and most patients who follow their treatment plan consistently are able to maintain useful vision for their lifetime. The earlier the condition is detected and managed, the better the long-term outcome tends to be.
Adults at average risk are generally advised to have a baseline comprehensive eye exam at age 40 and every one to two years after age 60. If you have risk factors such as a family history of glaucoma, elevated eye pressure, or belong to a higher-risk ethnic group, your eye doctor may recommend starting screenings earlier and scheduling them more frequently. Patients already diagnosed with glaucoma typically need visits every three to six months.
The vast majority of people diagnosed with glaucoma, particularly when it is caught early, do not lose their vision. Significant vision loss from glaucoma is most common in cases that go undiagnosed for many years or are not treated consistently. Modern treatments are highly effective at halting or slowing progression. The combination of regular monitoring and adherence to your treatment plan gives you the best chance of preserving your sight.
Ocular hypertension means that your eye pressure is higher than normal, but there is no detectable damage to the optic nerve or changes to your visual field at that time. Not everyone with elevated pressure will develop glaucoma, but it is a significant risk factor. Your eye doctor will monitor you closely if you have ocular hypertension and may recommend starting treatment to reduce your risk, depending on other factors in your individual profile.
Open-angle glaucoma typically affects both eyes, but it often progresses at different rates in each eye. It is possible for one eye to have significantly higher pressure or more advanced damage than the other. For this reason, each eye is evaluated and, when necessary, treated independently. Never assume that normal findings in one eye mean the other eye is also healthy.
Missing doses allows eye pressure to rise, which can cause further irreversible damage to the optic nerve. If you miss a dose, take it as soon as you remember, unless it is nearly time for your next scheduled dose. Do not double up on drops to compensate for a missed one. If you find it consistently difficult to stay on schedule, speak with your eye doctor about alternative strategies or treatment options that may be easier to maintain.
See Our Eye Doctors at NewView Eye Center
If you have concerns about glaucoma or have not had a comprehensive eye exam recently, our team is here to help. NewView Eye Center brings advanced glaucoma diagnostics and a full range of treatment options, including SLT laser therapy, MIGS, and personalized medical management, to patients across Northern Virginia. We are committed to protecting your vision through expert, attentive, and individualized care from your very first visit.
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