Laser Photocoagulation for Diabetic Retinopathy

What To Expect

Laser photocoagulation is usually done as an outpatient procedure using a local or topical anesthetic that affects only the eye. You do not have to stay overnight in a hospital.

You will need someone to drive you home from the doctor's office or clinic after the procedure. Eyedrops are used to widen (dilate) your pupils before the procedure. And your eyes will remain dilated for several hours afterward. Wear sunglasses to keep bright light out of your eyes while they are still dilated.

Your vision may be blurry and your eye may hurt a little for a day or two after the treatment.

Be sure to keep all follow-up appointments with your doctor and report any changes in vision that you notice. Follow-up treatment can make a big difference in keeping your vision for the long term.

Why It Is Done

Laser photocoagulation is done to reduce the risk of vision loss caused by diabetic retinopathy. It is most often used to stabilize vision and prevent future vision loss rather than to improve vision loss that has already occurred. (Sometimes focal photocoagulation for macular edema caused by nonproliferative retinopathy can help restore lost vision.)

Laser photocoagulation may be used to treat and prevent further progression of:

• Macular edema. Focal photocoagulation is sometimes used in these cases.
• Proliferative retinopathy. Scatter (pan-retinal) photocoagulation is used to treat proliferative retinopathy.

How Well It Works

Laser treatment may not restore vision that has already been lost. But when it is done in a timely manner, laser treatment may reduce the risk of future vision loss.

Risks

Laser photocoagulation burns and destroys part of the retina and often results in some permanent vision loss. This is usually unavoidable. Treatment may cause mild loss of central vision, reduced night vision, and decreased ability to focus. Some people may lose some of their side (peripheral) vision. But the vision loss caused by laser treatment is mild compared with the vision loss that may be caused by untreated retinopathy.

Rare complications of laser photocoagulation may cause severe vision loss. These include:

• Bleeding in the eye (vitreous hemorrhage).
• Traction retinal detachment.
• Accidental laser burn of the fovea (a depression in the central macula that contains no blood vessels). This results in severe central vision loss.