BACKGROUND To elucidate whether eyelid squinting improves near and distance vision in against-the-rule (ATR) and with-the-rule (WTR) simple myopic astigmatism in pseudophakic eyes. METHODS A refraction-model eye was mounted on a wavefront analyzer. The eyelid fissure was simulated using a slit placed horizontally in front of the model eye. Four different refractive statuses [- 1.50 diopters (D) and - 3.00 D of both WTR and ATR simple myopic astigmatism] were set using cylindrical lenses. For each refractive status (emmetropia, - 1.50 D WTR, - 1.50 D ATR, - 3.00 D WTR, and - 3.00 D ATR astigmatism), wavefront aberrations were measured, both with and without the slit, 40 times each. RESULTS The 2 mm horizontal slit caused a hyperopic focus shift (+ 6.69 μm) in - 1.50 D WTR astigmatism, whereas, in - 1.50 D ATR astigmatism, it caused a myopic focus shift (- 2.01 μm). The astigmatism was decreased in the ATR astigmatism groups and increased in the emmetropia and WTR astigmatism groups, respectively. Total aberrations were decreased in the emmetropia and WTR astigmatism groups and increased in the ATR astigmatism groups. When the reference plane was set to the near plane, total aberrations were decreased in the ATR astigmatism groups. CONCLUSION As the horizontal slit was placed in front of the model eye, the focus moves nearer in ATR astigmatism and farther in WTR astigmatism. These effects of eyelid cause improvement of near vision of pseudophakic eyes with ATR astigmatism.

中文翻译：

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pseudo眼斜视可改善伪晶状体眼的规则外近视力和规则外散光的远视力：一项眼部模型实验研究。

背景技术为阐明假晶状体眼中的规则（ATR）和规则（WTR）单纯性近视散光，眼睑斜视是否能改善近距离和远距离视力。方法将折射模型的眼睛安装在波前分析仪上。使用水平放置在模型眼睛前面的缝隙模拟眼睑裂痕。使用柱面透镜设置四种不同的屈光状态[-1.50屈光度（D）和-3.00 D的WTR和ATR简单近视散光]。对于每种屈光状态（正视，-1.50 D WTR，-1.50 D ATR，-3.00 D WTR和-3.00 D ATR散光），分别测量有和无狭缝的波前像差，每次40次。结果2 mm水平狭缝在-1.50 D WTR散光中引起远视焦点偏移（+ 6.69μm），而在-1.50 D ATR散光中，它引起了近视焦点偏移（-2.01μm）。在ATR散光组中散光减少，在正视散光组和WTR散光组中散光增加。屈光不正和WTR散光组的总像差降低，而ATR散光组的总像差增加。当参考平面设置为近平面时，ATR散光组的总像差降低。结论由于将水平缝隙放置在模型眼的前面，因此在ATR散光中焦点会移近，而在WTR散光中焦点会移远。眼睑的这些作用导致具有ATR散光的假晶状体眼的近视力提高。屈光不正和WTR散光组的总像差降低，而ATR散光组的总像差增加。当参考平面设置为近平面时，ATR散光组的总像差降低。结论由于将水平缝隙放置在模型眼的前面，因此在ATR散光中焦点会移近，而在WTR散光中焦点会移远。眼睑的这些作用导致具有ATR散光的伪晶状体眼的近视力提高。屈光不正和WTR散光组的总像差降低，而ATR散光组的总像差增加。当参考平面设置为近平面时，ATR散光组的总像差降低。结论由于将水平缝隙放置在模型眼的前面，因此在ATR散光中焦点会移近，而在WTR散光中焦点会移远。眼睑的这些作用导致具有ATR散光的假晶状体眼的近视力提高。