Medically reviewed by Dr. Niranjana Bejan Singh. Written to established clinical-education standards (AAO/Mayo/NHS/NEI) and adapted for this hospital. Not a substitute for professional medical advice.
Focal/grid laser photocoagulation treats diabetic macular edema (DME), a swelling of the macula caused by leaking blood vessels from diabetic eye disease. A laser is used to seal specific leaking micro-blood vessels (focal treatment) or to treat a broader pattern of diffuse leakage and swelling around the macula (grid treatment). This helps reduce fluid leakage and stabilize vision, though it does not reverse damage already done. It is often used alongside anti-VEGF injections rather than as the sole treatment.
Who typically needs this
- Recommended for diabetic macular edema, particularly when leakage is well-defined and away from the very center of the macula.
- Considered for patients whose diabetic eye disease is affecting central vision.
- May be combined with anti-VEGF injections for more thorough control of swelling.
- Best planned once blood sugar, blood pressure, and cholesterol are as well-controlled as possible.
What to expect
- Performed in the clinic; eye drops numb the surface and dilate the pupil.
- A special contact lens is placed on the eye to help the laser focus precisely on the retina.
- The laser delivers brief pulses of light that seal leaking vessels or treat swollen retinal tissue; patients may notice brief flashes of light.
- More than one laser session may be needed depending on how the retina responds.
Recovery
- Vision may be blurry for the rest of the day because of the dilating drops and light exposure.
- Some patients notice small blind spots (scotomas) at treated areas, which are usually not noticeable in daily life.
- Normal activities can generally resume the same or next day.
- Regular follow-up and retinal imaging are needed to monitor how well the swelling has responded.
Risks to know about
- Small permanent blind spots can form at laser sites, particularly if treatment is close to the very center of the macula.
- Temporary blurring, or rarely a decrease in central vision, can occur if the treated area is near the fovea.
- Laser does not reverse damage already present, and swelling can recur if the underlying diabetes is not well controlled.
- As with any retinal procedure, repeat treatments may be needed over time.
Frequently asked questions
Will laser treatment cure my diabetic macular edema?
It reduces leakage and helps stabilize vision, but it does not cure diabetic eye disease — ongoing blood sugar control and regular eye monitoring remain essential.
Is the laser painful?
Most patients feel only mild discomfort or a brief stinging sensation, not significant pain.
Will I notice the treated spots in my vision?
Small blind spots can form, but they are usually outside central vision and not noticeable during normal daily activities.
How is this different from anti-VEGF injections?
Anti-VEGF injections treat the whole macula with medication and are often used first or alongside laser; focal/grid laser targets specific leaking areas and can provide more lasting local control.
Ready to see us?
Call the appointment desk, or book online — we will confirm your time by phone.
Sources consulted: AAO — What Is Diabetic Retinopathy?, NEI — Diabetic Retinopathy . General medical information — not a substitute for professional diagnosis. Medically reviewed by Dr. Niranjana Bejan Singh.
← Treatments