The iris is the coloured part of our eye that surrounds our pupil (the black center of our eye). The iris is a muscle that controls the size of the pupil. It helps the pupil change size depending on how much light is coming into the eye.

intraocular pressure

Similar to blood pressure, your intraocular pressure is an important diagnostic tool to determine your eye health. High intraocular pressure puts you at risk for glaucoma. This is measured using tonometry.

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