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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.
Laser peripheral iridotomy (LPI) is the preferred procedure for treating angle-closure glaucoma caused by relative or absolute pupillary block.he iridotomy site should be in the peripheral third of the iris just anterior to the arcus. A crypt or a thinned area of the iris is recommended. Most ophthalmologists place the iridotomy between 11 oâclock and 1 oâclock, where it is superiorly covered by the lids.