網膜復位術が黄斑機能に与える影響

The macular function following retinal detachment surgery

（17-D-11）　黄斑部剥離を伴わない裂孔原性網膜剥離の術後患者15名，15眼（21〜71歳，平均47.9±22.0歳）の黄斑機能を調査した。僚眼と比較した術後視力の差は全例が1段階以内であった。ハンプリー自動視野計で測定した術後の網膜中心窩閾値は，僚眼と比較して15眼中14眼（93％）で低下していた。中心部（2.6°以内）と傍中心部（2.7〜5.4°）から記録した多局所網膜電図の陽性波振幅は，僚眼と比較してそれぞれ12眼（80％）と15眼（100％）で低下していた。強膜全周締結術を行った3眼全例で傍中心部からの振幅の低下が著明であった。これらの結果から，強膜内陥術が黄斑部機能に影響を及ぼすことが推測された。

We evaluated the macular function in 15 eyes of 15 patients who underwent surgery for retinal detachment. The ages ranged from 21 to 71 years, average 48 years. The macula was not apparently involved at the time of surgery. Retinal reattachment was obtained in all the 15 eyes. The differences in visual acuity between the operated and the fellow eyes were within one line in all the cases. When measured by Humphrey Visual Analyzer, the foveal threshold in the operated eyes was less than in the fellow eyes in 14 of 15 eyes (93%) . By multifocal electroretinogram, the positive wave amplitudes in the central area (＜2.6°) and the paracentral area (2.7~5.4°) were smaller in the operated eyes than the fellow eyes in 12 eyes (80%) and 15 eyes (100%) respectively. The amplitudes in the paracentral area were remarkably decreased in all of 3 eyes treated by encircling scleral buckling. The findings seemed to show that scleral buckling unfavorably affects the macular function.