Most people aren't as familiar with eye pressure numbers as they are with blood pressure or cholesterol numbers. Of course, everyone has some pressure within the eye. But how do you know when it's too high? Is there a common guideline or is it different for each person? Understanding your number, and what it means, can be a helpful tool in tracking the progress of your treatment.
What's a “high” IOP?
Typically, a pressure of 14-16 millimeters of mercury (mm HG) is considered normal. A pressure of 21 mm HG or higher is considered cause for concern. But everyone's optic nerve is different. An IOP measurement deemed normal in some eyes might be considered high in others.
Your target IOP
A healthy IOP for you may not be the same as a healthy IOP for someone else. Eye pressure and the optic nerve's ability to tolerate it will differ from person to person. Be sure to consult with your doctor about what your target number should be.
Spikes in pressure
IOP must be managed around the clock. Most patients with open-angle glaucoma experience significant fluctuations in IOP during the day. Because these spikes can contribute to the progression of glaucoma, it's essential to take your medication as directed.