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目的:網膜中心静脈閉塞症に網膜混濁が併発した2症例の報告。症例と経過:1例は58歳男性で発症から6日後に受診した。患眼視力は1.2で,網膜中心静脈閉塞症の所見と,黄斑耳側の静脈周囲に網膜の混濁があった。網膜動脈への流入遅延はなく,2か月後に眼底所見は正常化した。他の1例は58歳男性で発症から4週後に受診した。患眼視力は0.7で網膜中心静脈閉塞症の所見があった。赤外蛍光造影で網膜毛様静脈(optociliary vein)の形成があった。4か月後に視力が0.2に低下し,網膜動脈分枝閉塞症が併発していた。網膜毛様静脈は初診時よりも発達していた。結論:第1例にあった網膜混濁は,斑状虚血性網膜白濁(patchy ischemic retinal whitening)と思われた。第2例では,網膜毛様静脈の形成により乳頭周囲の網膜循環動態が変化し,網膜虚血を誘発した可能性がある。
Purpose:To report two cases of central retinal vein occlusion manifesting turbid retina. Cases:A 58-year-old man presented with blurring in his right eye since 6 days before. His visual acuity was 1.2 right. The right eye showed findings of central retinal vein occlusion associated with paravenous opacity temporal to the macula. Fluorescein angiography showed normal inflow pattern. The fundus became normal 2 months later. Another 58-year-old man was seen 4 weeks after blurring in his right eye. His visual acuity was 0.7. Funduscopy showed central retinal vein occlusion. Optociliary vein was detected by infrared angiography. His visual acuity decreased to 0.2 4 months later. He had developed branch retinal artery occlusion. Optociliary vein became more congested. Conclusion:Retinal opacity in the first case may be the so-called patchy ischemic retinal whitening. In the second case,optociliary vein may have altered the dynamics of peripapillary circulation resulting in retina ischemia.
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