How Does Glaucoma Affect Your Vision? The Role of Intraocular Pressure

Glaucoma is often called the "silent thief of sight" for a reason—it develops gradually, usually without noticeable symptoms, until significant vision loss has occurred. By the time most people realize something is wrong, the damage is irreversible. But what exactly causes this loss of vision?
 

The Connection Between Intraocular Pressure and Vision Loss

Your eyes continuously produce a clear fluid called aqueous humor, which flows through the eye and drains through a specialized tissue called the trabecular meshwork. When this drainage system isn’t functioning properly, fluid builds up, leading to increased intraocular pressure.
 

Over time, elevated IOP damages the optic nerve—the crucial link between your eyes and your brain. Once optic nerve fibers deteriorate, blind spots begin to form in your peripheral vision. At first, these gaps in sight are small and easy to miss. But as the damage progresses, these blind spots grow larger, leading to tunnel vision and, in severe cases, complete blindness.
 

The Importance of Regular Glaucoma Screenings

You won’t feel increased eye pressure, and vision changes happen so gradually that you may not notice them until significant loss has occurred. That’s why glaucoma screenings are not just important—they're essential. At Bella Eye Care Optometry, we use advanced diagnostic tools to check your IOP, assess your optic nerve, and evaluate your overall eye health.
 

Screenings are especially important if you fall into a higher-risk category, which includes:

  • Individuals over 60

  • People with a family history of glaucoma

  • African American and Hispanic populations, who have a higher risk of developing the disease

  • Those with underlying conditions like diabetes or high blood pressure

  • Individuals with sleep apnea should be vigilant, as the condition is a known risk factor for glaucoma and may contribute to its progression.

  • South Asians and Japanese individuals have a higher predisposition to normal-tension glaucoma, making regular eye exams crucial—even when their eye pressure falls within the normal range.
     

Even if you don’t have risk factors, regular screenings can provide peace of mind and ensure early intervention if needed.
 

March Is Save Your Vision Month—Take Action Now

March is recognized as Save Your Vision Month, a reminder of how precious and fragile our eyesight truly is. If you haven’t had a comprehensive eye exam recently, now is the perfect time to schedule one. Protecting your vision starts with awareness and prevention.
 

Glaucoma is a serious condition that can steal your sight without warning. But with early detection and proper management, vision loss can be slowed or even prevented. Don’t wait for symptoms—by then, it’s too late.
 

Schedule your glaucoma screening at Bella Eye Care Optometry and protect your vision for the future. Visit our office in Newark, California, or call (510) 494-8880 to book an appointment today.