糖尿病網膜症に対する汎網膜光凝固の長期予後—その1．視力の経過

Long-term results of panretinal photocoagulation for diabetic retinopathy. Part 1. Course of visual acuity

　汎網膜光凝固後の糖尿病網膜症眼の長期視力予後について検討した。対象は43例73眼で，増殖前網膜症19例25眼，増殖網膜症31例48眼，年齢30〜76歳（平均51歳），観察期間60〜150か月（平均7年9か月）であった。光凝固前に比し視力が2段階以上悪化したのは，光凝固2年後では増殖前網膜症10眼（40.0％），増殖網膜症15眼（31.3％）で，最終観察時点ではそれぞれ13眼（52.0％），20眼（41.7％）であった。このうち増殖前網膜症の10眼（76.9％），増殖網膜症の10眼（50.0％）は，嚢胞様黄斑浮腫と黄斑浮腫遷延化による黄斑変性のために視力が悪化した。最終視力が0.5以上であったのは増殖前網膜症では11眼（44.0％），増殖網膜症では25眼（52.1％）であった。

We evaluated the long-term result of panretinal photocoagulation for diabetic retinopathy. The series comprised 73 eyes, 43 patients, including preproliferative retinopathy 25 eyes 19 cases and proliferative retinopathy 48 eyes 31 cases. The ages of patients ranged from 30 to 76 years, average 51 years. The follow-up period ranged from 60 to 150 months, average 93 months. During 2 years after panretinal photocoagulation, the visual acuity de-creased by 2 or more lines in 10 eyes, 40%, withpreproliferative retinopathy and in 15 eyes, 31%, with proliferative retinopathy. At the final exami-nation, the incidence was 13 eyes, 52% for the former and 20 eyes, 42% for the latter. Cystoid macular edema or macular degeneration after pro-longed macular edema was the major cause of visual deterioration in 10 eyes, 77%, with pre-proliferative retinopathy and in 10 eyes, 50%, with proliferative retinopathy. Final visual acuity was 0.5 or better in 11 eyes, 44%, with preproliferative retinopathy and in 25 eyes, 52%, with proliferative retinopathy.