Intraocular Pressure

Like blood pressure in the body, we also have eye pressure in the eye called intraocular pressure (IOP).

The eye pressure occurs as result of production of fluid in the eye called aqueous humor, which is also expected to drain proportionately, thereby creating a balanced pressure in the eye.

Eye pressure is measured in millimeters of mercury (mm Hg) by various clinical devices and methods and the process is called tonometry. Normal eye pressure ranges from 10-21 mmHg, and eye pressure of greater than 21 mm Hg is considered higher than normal. This is also a possible risk of developing glaucoma due to increased pressure which can cause damage at the back of the eye.

In some individuals, the eye pressure may be high ( above 21mmHg) but there is no functional damage at the back of the eye, this is referred to as ocular hypertension.

The eye pressure also tends to change value according to variation during the day, this means your eye pressure may increase as day progresses.

It is expected that you check and monitor your eye pressure frequently at least every 6 months to detect any changes in your eye pressure or at the back of the eye(retina).

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