What it is
Focal and grid laser photocoagulation is a retinal laser treatment for leakage and swelling in the retina. Focal laser targets specific leaking blood vessels, while grid laser applies a pattern of laser spots to selected areas of the retina. Both help manage leakage and macular oedema — fluid build-up at the centre of vision.
Who it's for
People with selected cases of retinal vascular disease and macular oedema — for example from diabetes or a retinal vein occlusion — as advised after a retina examination and OCT scan. It may be used alone or alongside eye injections.
What to expect
The treatment is done in the outpatient clinic. Your pupil is dilated, the eye is numbed with drops, and a special contact lens is placed on the eye to focus the laser. You will see flashes of light, and the treatment usually takes a few minutes.
Recovery
Vision may be blurred for a few hours, so come with someone who can take you home. Swelling settles gradually over weeks to months, and follow-up visits with OCT scans check the response. Further treatment is sometimes needed.
Frequently asked questions
Will focal or grid laser improve my vision?
The main aim is to reduce leakage and swelling and to protect your vision. Some people notice an improvement, but this varies.
Is it the same as PRP laser?
No. PRP treats the outer parts of the retina to reduce abnormal new blood vessels, while focal and grid laser treat leakage and swelling closer to the centre of the retina.
Medically reviewed by Dr. Sweta Patro