Scanning laser polarimetryによる網膜黄斑部評価

Assessment of the macula with scanning laser polarimetry

（B5-2-19）　Scanning laser polarimetryを用いた黄斑部の緑内障性障害の評価法を検討した。緑内障患者10人15眼（平均58.7±11.2歳，視野障害の平均はMD＝−21.83±6.4dB）と正常者15人15眼（平均年齢50.6±21.5歳）に対してLDT社製NFAII®を用い視神経乳頭および黄斑部をそれぞれ3回ずつ撮影し検討した。黄斑部の平均の厚さは正常者群51.9±9.31μm，緑内障患者群52.5±13.3gmで有意差はなく，視神経乳頭も，耳側の厚さは緑内障患者群48.17±15.5μmに対し正常者群46.56±10.1μmで有意差はみられなかった。本装置を用いた黄斑部の評価は現状では難しいと考えられた。

We measured the thickness of nerve fiber layer in the macula in 30 eyes. The series comprised 15 eyes of 10 glaucoma patients and 15 eyes of 15 normal persons. The ages averaged 58.7±11.2 years in the former group and 50.6 ±21.5 years in the latter. In the glaucoma group, the mean deviation by Humphrey Field Analyzer program 30-2 averaged -21.83±6.4 dB. The disc and macular areas were measured three times with a Nerve Fiber Analyzer II (NFA^TM). The thickness of retinal nerve fiber layer in the macula averaged 51.9±9.31 gm in the normal group and 52.5±13.3 gm in the glaucoma group. The difference between the two groups was not significant. The thickness temporal to the disc averaged 46.56±10.1βm in the normal group and 48.17±15.5 um in the glaucoma group. The difference was not significant. The findings show the difficulty of assessing the macula with the present technical set-up.