Reaching your 40s marks an exciting milestone, but your body also begins to change in subtle ways. One of the most critical changes happens inside your eyes, where the risk of glaucoma — a group of progressive eye diseases that damage the optic nerve — begins to climb.
Yet about half of all people with glaucoma don't even know they have it, according to the Centers for Disease Control and Prevention (CDC, 2024). This is because the early stages rarely cause pain, discomfort, or obvious changes to your vision.
To help you navigate these changes and protect your sight, Vicki Y. Lin, MD, provides personalized care at iSight Vision Care in Fountain Valley, California. Taking proactive steps now can protect your sight for the rest of your life.
Here, we explain how to read your eye pressure numbers and avoid common misconceptions, so you can preserve your sight for years to come.
During a comprehensive eye exam, we measure your intraocular pressure, which is the fluid pressure inside your eyes. The normal eye pressure typically ranges between 10 and 21 millimeters of mercury (mmHg). This pressure is maintained by a delicate balance of fluid production and drainage.
However, these numbers aren't a one-size-fits-all rule for every patient. Some people can develop optic nerve damage even when their readings are well within the normal range. Conversely, others might have higher pressure for years without ever experiencing any damage to their sight.
Many people believe that having an eye pressure reading under 22 mmHg guarantees they won't develop glaucoma. Research from the University of Utah (2026) shows that glaucoma can still develop at lower pressures, meaning a single number doesn't tell the whole story. Relying on pressure numbers alone can lead to a false sense of security.
That's why Dr. Lin looks at the complete picture of your eye health rather than relying on a single test. We examine your optic nerve directly, check your visual fields, and perform specialized scans to catch the earliest signs of change. This comprehensive approach ensures we detect issues long before you notice any vision loss.
If we detect elevated pressure or early signs of nerve damage, we'll work with you to create a customized management plan. We offer advanced therapies, including prescription eye drops and modern laser procedures, to help lower your eye pressure and stop the disease from progressing. Managing the condition early is the key to preserving your sight.
On the other hand, you don't have to wait for symptoms to appear before you start taking care of your eyes. Catching changes early gives you the best chance to protect your vision for the future.
If you're experiencing shifts in your vision or simply need a baseline screening, our advanced glaucoma treatment options are designed to keep your eyes healthy and strong. Contact our office today to schedule your baseline eye exam with Dr. Lin.
