grid pattern argon laser photocoagulation for diabetic diffuse macular edema

purpose: to determine the effect of grid pattern laser photocoagulation on diabetic diffuse macular edema with assessment of visual outcome. patients & methods: the author reviewed the medical records of 84 eyes of 62 patients with diabetic diffuse macular edema treated with grid pattern green argon laser photocoagulation in farabi eye hospital between the years 1992-1995, the follow-up period was 16-48 months (average 24.55±6.42, median 28 mounths). results: visual acuity was improved in 11.9% unchanged in 65.4% and worsened in 22.7% of eyes. conclusion: in assessing long-term visual outcome, grid laser photocoagulation is an effective modality in maintaining or improving visual acuity.