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Laser iridotomy uses a very focused beam of light to create a hole on the outer edge, or rim, of the iris, the coloured part of the eye. This opening allows fluid (aqueous humour) to flow between the anterior chamber, the front part of the eye, and the area behind the iris, the posterior chamber. This opening may decrease pressure in the eye and usually prevents sudden buildup of pressure within the eye, which occurs during an episode of acute closed-angle glaucoma.
Some people feel a mild but sharp sensation in the eye during this procedure. But there usually is no pain after laser iridotomy.
Laser iridotomy can be done without admitting the person to a hospital. The person may need to see his or her doctor 1 hour after laser surgery. The person will also need to see the doctor for a follow-up examination as recommended.
Laser iridotomy is mainly used to try to:
Laser iridotomy may prevent further episodes of sudden (acute) closed-angle glaucoma.
Laser iridotomy also may prevent slow-forming (subacute) closed-angle glaucoma in people who are at risk for closed-angle glaucoma.
Complications of laser iridotomy may include:
Later complications may include:
Closed-angle glaucoma usually affects both eyes over time. When sudden (acute) closed-angle glaucoma occurs in one eye and laser surgery has been done on that eye, laser iridotomy is usually done on the other eye to try to prevent the condition from developing.
High pressure in the eyes may continue after laser iridotomy. The person may need to be watched closely for this even after the procedure. Some people may need additional treatment, such as eyedrops or surgical iridectomy, to lower the eye pressure.
Current as of: December 18, 2019
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & Anne C. Poinier MD - Internal Medicine & Christopher J. Rudnisky MD, MPH, FRCSC - Ophthalmology
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