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What is a laser peripheral iridotomy? A laser peripheral iridotomy is a treatment used to treat angle closure. If you have healthy eyes, the fluid in your eye (aqeous humour) flows through your pupil into the front of your eye, and drains away through drainage channels called the trabecular meshwork. of 4 Having a laser peripheral iridotomy The aim of this information sheet is to answer some of the questions you may have about having a laser peripheral iridotomy.
Why It Is Done. Laser iridotomy is mainly used to: 1  Treat closed-angle glaucoma after the pressure in the affected eye has been reduced with medicine or when medicines fail. 2  Prevent closed-angle glaucoma in people who have narrow drainage angles and those people who have had closed-angle glaucoma in their other eye.aser Iridotomy for Glaucoma. Guide. Laser iridotomy uses a very focused beam of light to create a hole on the outer edge, or rim, of the iris, the colored part of the eye.