If you are experiencing a medical emergency please dial 911 immediately
Intraocular (say "in-truh-AW-kyuh-ler") pressure is the pressure caused by the fluid inside the eye that helps maintain the shape of the eye. The level of pressure inside the eyes depends on:
The pressure within the eyes varies during the day. Normally, the pressure inside the eye ranges from 10 millimeters of mercury (mm Hg) to 21 mm Hg.
Doctors measure IOP with a tonometry test. This is one of several tests that helps determine your risk for glaucoma.
Last Revised: February 28, 2012
Author: Healthwise Staff
Medical Review: Adam Husney, MD - Family Medicine & Christopher J. Rudnisky, MD, MPH, FRCSC - Ophthalmology
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