Contrast Sensitivity Changes After Different Regimens of Argon Laser Panretinal Photocoagulation in Proliferative Diabetic Retinopathy
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Effects of different regimens of argon laser panretinal photocoagulation (PRP) on contrast sensitivity were studied in 36 patients (36 eyes) having proliferative diabetic retinopathy (PDR) with no clinically significant macular oedema. All eyes were randomly assigned to be treated with argon green PRP either in single session (group A), two sessions separated by one week interval (group B) or three sessions each separated by one week interval (group C). In each eye contrast sensitivity was evaluated using Cambridge Low-Contrast Sensitivity Charts before laser treatment then one week and 3 months after end of treatment.