Laser Iridotomy for Narrow Angles: Uses and Risks

Laser peripheral iridotomy uses laser energy to make a small opening in the iris. It can help fluid move through the eye and is used for angle-closure glaucoma or selected people at significant risk of angle closure.

Narrow angles do not always mean treatment

An eye specialist should assess the drainage angle, eye pressure, optic nerve and relevant risk factors. Moorfields Eye Hospital explains that most people with narrow angles do not develop high pressure or glaucoma, so preventive laser is not recommended for everyone. Monitoring or a different treatment may be appropriate.

Urgent symptoms

Sudden severe eye pain, a red eye, blurred vision or haloes, headache, nausea or vomiting can occur with acute angle closure and require urgent emergency eye assessment. An educational webpage cannot diagnose or rule out this condition.

Procedure and risks

Before laser, drops may be used and the eye is examined. Possible effects or complications include temporary blurred vision, discomfort, inflammation, pressure rise, bleeding, glare or visual disturbance, the opening closing or needing repeat treatment, and failure to control the underlying condition. The treating ophthalmologist should explain alternatives, including observation, medicines or lens-related treatment where relevant.

Read the Moorfields NHS narrow-angle guide and its laser peripheral iridotomy guide.

Revitalize care checks

Confirm the named contracted ophthalmologist and hospital, diagnosis, reason for treatment, tests, alternatives, quotation, follow-up and emergency plan. See Revitalize’s eye treatment information and contact route.