光干渉断層計が有用であった経過の異なる糖尿病黄斑症の2例

Optic coherence tomography was useful in two cases of diabetic macular edema with different clinical outcome

　3年前に汎網膜光凝固を受けている増殖糖尿病網膜症の59歳男性（症例1）の左眼と，前増殖糖尿病網膜症の49歳男性（症例2）の右眼の経過を，光干渉断層計（OCT）で追跡した。2症例ともびまん性黄斑浮腫があった。症例1では視力低下に先行して網膜厚が増大した。症例2では黄斑浮腫に対して硝子体手術を予定していたが，OCTで網膜厚の減少傾向が確認されたので手術を延期したところ，手術を行うことなく視力が改善した。2症例とも全身状態などのために，蛍光眼底造影は実施できなかった。

We followd up the clinical course of two diabetic patients using optical coherence tomography (OCT) . The first case, 59-year-old male, had been treated by panretinal photocoagulation 3 years before for proliferative diabetic retinopathy. The second case was a 49-year-old male with preproliferative diabetic retinopathy. In the left eye of the first case, decrease in visual acuity was preceded by increase in retinal thickness. In the right eye of the second case, scheduled vitreous surgery for macular edema was postponed because of gradual decrease in retinal thickness. The visual acuity improved later without surgical intervention. Fluorescein angiography could not be performed in both cases due to poor systemic condition or lack of willingness to the examination.