網膜静脈分枝閉塞症の蛍光眼底造影所見と光干渉断層所見

Optical coherence tomographic and fluorescein angiographic findings in branch retinal vein occlusion

　急性期の網膜静脈分枝閉塞症24眼を光干渉断層計によって観察し，中心窩厚と視力との関係を調べた。さらにフルオレセイン蛍光眼底造影により，黄斑部蛍光漏出面積，周中心窩毛細血管の閉塞角度，出血範囲を調べ，中心窩厚との関係を検索した。中心窩網膜の断層像は，網膜外層膨化（100％）・嚢胞様変化（96％）・漿液性網膜剥離（20％）が，単独あるいは複合してあった。中心窩厚は140〜780μm （平均470μm）で，視力はO．1〜1.2（平均0.5）で，中心窩厚と視力は中等度の負の相関を示した（R＝0.42,p＜0.05）。黄斑部蛍光漏出面積が広いほど、中心窩は厚い傾向があった。

We evaluated the correlation between visual acuity and cross-sectional retinal image in 24 eyes with macular edema secondary to fresh branch retinal vein occlusion. Optical coherece tomography (OCT) showed three patterns of macular edema : retinal swelling in the outer retinal layer (100%), cystoid macular edema (96%), and serous retinal detachment (20%). More than one pattern was often present in the same eyes. The foveal thickness ranged from 140 μm to 780μm, average 470μm. The best corrected visual acuity ranged from 0.1 to 1.2, average 0.5. There was an intermediate negative correlation between the foveal thickness and visual acuity (R=0.42, p＜0.05). The foveal thickness was greater in eyes with wider area of perifoveal vascular leakage as seen by fluorescein angiography.