Objective: To compare micropulse 810nm diode laser photocoagulation versus argon laser photocoagulation for treatment of diabetic macular edema. Micropulse laser technique will be determined by an initial clinical trial comparing single versus double density laser photocoagulation techniques for treatment of diabetic macular edema.The single density is based on the Early Treatment Diabetic Retinopathy Study (ETDRS) grid photocoagulation technique and the double density increases the number of spots. Methods: Patients with diabetic macular edema will be assigned to receive either micropulse 810nm diode laser photocoagulation or argon laser photocoagulation therapy. First, in a smaller clinical trial, patients will be assigned to single or double density micropulse 810nm diode laser to determine best strategy for this therapy. Visual acuity, fundus photographs and fluorescein angiography, and optical coherence tomography measurements , autofluorescence and mfERG were obtained at baseline and at 1, 3 and 6 months and 12 months.
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Macular thickness measured by optical coherence tomography (OCT)
Timeframe: 12 months