This procedure is performed to treat or prevent angle-closure glaucoma. You will sit at the slit lamp after numbing drops are applied. Your doctor will place a special contact lens on your eye to focus the YAG laser. The laser creates one or two microscopic holes in the colored part of your eye (the iris). These holes create a new drainage pathway for the eye's fluid, bypassing a narrow or blocked natural angle. This lowers eye pressure and prevents a sudden, sight-threatening pressure spike (acute angle-closure attack). You may hear a clicking sound and feel a slight pinch or sting with each laser pulse.
Before procedure
You may be given eye drops (like pilocarpine) before the procedure to make the iris thinner and easier to penetrate.
Arrange for transportation home.
Continue all other glaucoma medications unless instructed otherwise. Inform your doctor of all medications, especially if you take blood thinners.
After procedure
You will use anti-inflammatory and pressure-lowering eye drops for a few weeks.
Your vision will be blurry, and the eye may be red, watery, and sensitive to light for a few hours.
You may see a "shower" of floaters or a fine, cobweb-like strand in your vision from debris; this usually settles.
Avoid strenuous activity for a day or two.
Complication and alarm signs
Common temporary side effects include blurred vision, mild inflammation, and a slight rise in eye pressure. The laser hole may sometimes close and require a repeat treatment. Rarely, the laser can affect other structures.
Contact your doctor if you experience: Severe pain, nausea, or vomiting, a sudden, severe headache, or a sudden drop in vision, as these could signal a pressure spike.