The influence of first near-spectacle reading correction on accommodation and its interaction with convergence.
The influence of first near-spectacle reading correction on accommodation and its interaction with convergence.
复制标题
第一次近眼镜阅读校正对调节的影响及其与会聚的相互作用。
DOI：
10.1167/iovs.08-3021
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发表时间：
2009
影响因子：
4.4
通讯作者：
Schor,CliftonM
中科院分区：
文献类型：
--
作者：
Vedamurthy,Indu;Harrison,WendyW;Liu,Yue;Cox,Ian;Schor,CliftonM
目的.调节和会聚可以适应模糊和视差刺激以及与年龄相关的振幅变化。这种能力会随着年龄的增长而下降吗？作者调查了短期适应第一近眼镜阅读校正的反射刺激反应（ASR）功能，反射振幅（AA），AC/A，CA/C比在一个pre-presbyopic和初期老花眼的人口，并确定这些功能的变化是否恢复后，停止使用近眼镜。30名视力正常的受试者参加了研究;他们的年龄范围为21至30岁（n= 15）和38至44岁（n= 15）。分别在配戴单视阅读眼镜近距离作业前、后2个月及停用近距离眼镜后2个月测量眼功能。配戴近视眼镜后，ASR功能的斜率和AC/A、CA/C比值无明显变化。有一个远视移位的ASR功能，显着减少近点的调节（NPA）和降低远点屈光。这些变化是年龄不变的，并没有恢复后2个月停止近眼镜磨损。这些结果意味着，NPA可能是增强正常的紧张性偏置的调节，提高了整个ASR功能，并产生近视屈光偏差。当佩戴阅读眼镜后这种偏差放松时，屈光状态发生远视移位，NPA从光学无穷远开始减少。
purpose. Accommodation and convergence can adapt to blur and disparity stimuli and to age-related changes in accommodative amplitude. Does this ability decline with age? The authors investigated short-term adaptation to first near-spectacle reading correction on the accommodative-stimulus response (ASR) function, accommodative amplitude (AA), AC/A, and CA/C ratios in a pre-presbyopic and an incipient presbyopic population and determined whether changes in these functions recovered after discontinuation of the use of near spectacles.methods. Thirty subjects with normal vision participated; their ages ranged from 21 to 30 years (n= 15) and 38 to 44 years (n= 15). Oculomotor functions were measured before and after single-vision reading spectacles were worn for near tasks over a 2-month period and then 2 months after the use of near spectacles was discontinued.results. The slope of the ASR function and the AC/A and CA/C ratios did not change significantly after near spectacles were worn. There was a hyperopic shift of the ASR function that significantly reduced the near point of accommodation (NPA) and lowered the far-point refraction. These changes were age invariant and did not recover after 2 months of discontinuation of near spectacle wear.conclusions. These results imply that the NPA may be enhanced normally by tonic bias of accommodation that elevates the entire ASR function and produces myopic refraction bias. When this bias relaxes after reading spectacles are worn, there is a hyperopic shift of the refractive state and a reduction of the NPA, specified from optical infinity.