J Korean Ophthalmol Soc.
1998 Jan;39(1):111-118.
Effective Dose of Laser Photocoagulation in Proliferative Diabetic Retnopathy
- Affiliations
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- 1Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Korea.
Abstract
- Effective dose of laser photocoagulation in proliferative diabetic retinopathy. We retrospectively studied 153 eyes of 106 patients to know correlation between the regression and the amount of retinal ablation, and to know clinical result after panretinal photocoagulation. Regression was observed in 100 eyes (65.4%), stationary status in 39 eyes (25.5%) and progression in 14 eyes (9.2%) in the 6 to 8 weeks following treatment. Stabilization was achieved in 98 eyes (64.1%) in the minimum follow-up of one year. Regression was observed in 78 eyes(79.6%) of low risk PDR versus 22 eyes (40.0%) of high risk PDR, and it was statistically significant (p=0.0001). The mean ablation area was 231.01+/-83.54 mm2. In high risk PDR, ablation area of eyes which were regressed was 279.33+/-111.39 mm2, compared to 220.42+/-91.61 mm2 which were not regressed(p=0.0337). In low risk PDR, there are no correlation between the ablation area and regression. Vision was decreased after photocoagulation 31 eyes(20.3%), and cystoid macular edema(CME) was the main cause of visual loss, however, the CME was not correlated with ablation area. Regression of new vessel was highly correlated with ablation area in high risk PDR.
