What Causes Glaucoma and Who Is at Risk?

No, high eye pressure alone does not mean you have glaucoma. This condition is called ocular hypertension, and while it is a significant risk factor, many people with elevated pressure never develop optic nerve damage. On the other hand, some people develop glaucoma even with normal eye pressure. The diagnosis depends on a thorough examination of your optic nerve and testing your peripheral vision to check for damage.

In most cases, open-angle glaucoma has no early warning signs. The first noticeable symptom is usually a gradual loss of your side vision, which happens so slowly you may not realize it until significant damage has occurred. As the disease advances, your vision narrows into what we call tunnel vision. This is why regular comprehensive eye exams are so important, even when your vision seems fine.

We use several tests to diagnose glaucoma accurately. Tonometry measures the pressure inside your eye. Gonioscopy allows us to examine the drainage angle where fluid exits your eye. Ophthalmoscopy gives us a detailed view of your optic nerve to look for damage. Visual field testing maps your peripheral vision to detect any loss. Optical coherence tomography, or OCT, creates high-resolution images of your optic nerve fibers so we can measure their thickness and detect even subtle damage.

The main types include open-angle glaucoma, the most common form where drainage channels gradually become less efficient over time. Angle-closure glaucoma occurs when the drainage angle suddenly narrows or closes, causing rapid pressure increases that require emergency treatment. Normal-tension glaucoma involves optic nerve damage despite eye pressure in the normal range. Secondary glaucoma results from other eye diseases, injuries, or medications. Congenital glaucoma is a rare form present at birth due to abnormal eye development.

We focus treatment on lowering your eye pressure to prevent further damage to your optic nerve. Prescription eye drops work by either reducing the amount of fluid your eye produces or improving drainage. Laser procedures can open blocked drainage channels or reduce fluid production. Minimally invasive glaucoma surgeries, or MIGS, use microscopic devices and techniques to lower pressure with faster recovery than traditional surgery. For advanced cases, we may recommend conventional filtering surgeries that create a new drainage pathway for fluid to leave the eye.

There is no guaranteed way to prevent glaucoma from developing. However, regular comprehensive eye exams allow us to detect the disease early, often before you notice any vision changes. When we catch glaucoma early and begin treatment promptly, we can often slow or stop vision loss and help you maintain good vision throughout your life.

Yes, glaucoma has a strong genetic component, so your close relatives should have regular comprehensive eye exams. If you have been diagnosed with glaucoma, your children, siblings, and parents face significantly higher risk. We typically recommend they begin screening at a younger age and have exams more frequently than the general population.

Lifestyle changes cannot cure glaucoma or replace medical treatment, but they can support your overall eye health. Regular moderate exercise may help lower eye pressure naturally. Maintaining a healthy weight, avoiding smoking, and eating a diet rich in leafy greens and omega-3 fatty acids all contribute to better eye health. Always wear protective eyewear during sports or activities that could injure your eyes.

Yes, though childhood glaucoma is rare. Congenital glaucoma may be present at birth when a baby's drainage system does not develop normally. Other forms can develop during childhood or adolescence. Parents may notice symptoms like excessive tearing, light sensitivity, cloudy corneas, or enlarged eyes in infants. Early diagnosis and treatment are critical to prevent permanent vision loss in children.

If left untreated, glaucoma causes progressive and permanent vision loss that can eventually lead to complete blindness. However, with early detection and consistent treatment, most people with glaucoma maintain useful vision for their entire lives. The key is catching it early and following your treatment plan carefully. Vision already lost to glaucoma cannot be restored, which is why prevention of further damage is so important.