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Home > Health Library > Intraocular pressure
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.
Current as of: August 31, 2020
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & Christopher J. Rudnisky MD, MPH, FRCSC - Ophthalmology
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