上下プリズム効果による水平眼位および回旋偏位と調節力への影響を検討した。水平眼位および回旋偏位 の検査の対象は,健常被験者 6 名(平均年齢 22.1 ± 3.5 歳) ,調節力検査の対象は,同じく 11 名(平均年 齢 21.3 ± 2.6 歳)とした。方法は優位眼・非優位眼それぞれに 2,4,6⊿を基底上方と下方に装用させた上 でシノプトフォア(Clement Clarke International)を用い,水平眼位および回旋偏位を測定した。また 両眼開放下にて優位眼に 1, 2⊿のプリズムをそれぞれ装用させ,visual display terminal 近点計 NP-200 (TOMEY 社)を用いて調節力を測定した。その結果,水平眼位は被験者の基準データの大きさに伴って,回 旋偏位は近視度数の強さに伴って増加する傾向がみられた。また,調節力は基準データに比べ 2⊿基底上方に て 0.82 D,2⊿基底下方にて 1.10 D 減少した(ANOVA, Scheffé, p < 0.05) 。これらの結果から,プリズ

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... 及ぼすことが示唆された。 (視覚の科学 34: 54-59,2013) キーワード:上下プリズム,偏心,調節力,水平眼位,回旋偏位 We investigated the influence of vertical imbalance induced by prismatic effect on horizontal eye position, cyclodeviation and accommodation.Enrolled in the horizontal eye position and cyclodeviation experiments were 6 subjects (average age 22.1 ± 3.5 years) ; 11 healthy volunteers (average age 21.3 ± 2.6 years) were enrolled in the accommodation experiment.As to the method: using 2, 4 and 6⊿ prisms base up (BU) and base down (BD) at each eye, horizontal eye position and cyclodeviation was measured with synoptophore (Clement Clarke International) .Using 1 and 2⊿ prism BU and BD at the dominant eye, accommodation of binocular vision was measured with visual display terminal (VDT) near point optometer NP-200 (TOMEY) .Results showed that horizontal eye position tended to increase with the amplitude of horizontal deviation and cyclodeviation tended to change with increase in myopia.Accommodation was reduced in comparison to the control group by 0.82 D wearing 2⊿ BU, and by 1.10 D wearing 2⊿ BD (ANOVA, Scheffé, p < 0.05) .These results suggest that vertical deviation induced by prismatic effects influenced horizontal eye position, cyclodeviation and accommodation.