Laser iridotomy is a surgical procedure that is performed on the eye to treat angle closure glaucoma, a condition of increased pressure in the anterior chamber that is caused by acute or chronic blockage of the normal circulation of fluid within the eye. The block occurs at the angle of the anterior chamber that is formed by the junction of the cornea with the iris. Angle closure occurs when the iris blocks the drainage site.

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For most types of angle closure, or narrow angle glaucoma, laser iridotomy is the procedure of choice.