Long-term effectiveness of modified grid laser photocoagulation for diffuse diabetic macular edema

Fifty eyes of 42 patients with background diabetic retinopathy and diffuse macular edema were included in a prospective, randomized, clinical study to determine the long-term visual results of modified grid laser photocoagulation compared with the natural course of the disease. At the end of the three annual follow-up visits there were more eyes with improved visual acuity in the treatment group and more eyes with worse visual acuity in the...