緑内障での視野障害を反映するHRTパラメータ

Optic disc findings by Heidelberg Retina Tomograph as parameters of visual field loss on open angle glaucoma

　開放隅角緑内障63眼につき，視野障害とHeideiberg Retina Tomographで得られる視神経乳頭の部位的指標topographic parameterとの関係を検索した。後者については，視神経乳頭耳側の−45°から＋45°の成分を算出し，Octopus−201の第31プログラムの平均沈下mean lossとの関係を重回帰分析法で解析した。その結果，視野の平均沈下とは，cup shape measureのみが有意の関係にあった（p＜0.05,T＝2.474）。以上から，cup shape measureは，視野障害の程度を反映する有用なパラメータであると考えられた。

We evaluated 63 eyes of chronic open angle glaucoma with particular attention to visual field defects and optic disc findings by Heidelberg Retina Tomograph (Ver 1,11) . The visual field was examined by an Octopus 201, Program No.31. Topographic parameters were obtained for the disc area, cup area, cup/disc area ratio, rim area, cup volume, rim volume, maximum cup depth, cup shape measure and retinal nerve fiber layer thickness in the temporal quadrant of the disc. The relationship between the topographic parameters and the mean loss in visual field was analysed by multiple linear regression model. The analysis showed the cup shape measure to be the sole significant predictor of the mean defect. The finding shows that cup shape measure is a useful parameter which reflects the central visual field changes in glaucoma.