網膜静脈分枝閉塞症自然経過例の視力予後

Visual outcome of conservatively treated branch retinal vein occlusion

　過去11年間に受診し，内服治療のみを行った黄斑浮腫のある網膜静脈分枝閉塞症33例33眼の視力経過を検索した。推定発症後1か月目と6か月目の視力，3か月目と6か月目の視力に有意の相関があった（p＜0.05）。3か月目の視力が0.4以上で6か月目の視力が0.7以上になった症例は50％であり，3か月目の視力が0.4未満であると6か月目の視力が0.7以上にはならなかった。このような場合には，光凝固などによる早期の積極的な治療を考慮する必要があると考えられた。

We reviewed a series of 33 eyes of branch retinal vein occlusion seen during the past 11 years. As inclusion criteria, all eyes had macular edema and had received medication only. There was a positive correlation in visual acuity between 1 month and 6 months after presumed onset (p＜0.05) and between 3 months and 6 months (p＜0.05). When the visual acuity was 20/50 or over at 3 months of onset, 50% of eyes had visual acuity of 20/30 or over at 6 months. When the visual acuity was below 20/50 at 3 months, no eye had visual acuity of 20/30 or over at 6 months. It appears that more aggressive treatment, including early photocoagulation, is indicated when the visual acuity is below 20/50 at 3 months after presumed onset of the disease.