Postblink changes in the ocular modulation transfer function measured by a double-pass method
Postblink changes in the ocular modulation transfer function measured by a double-pass method
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DOI：
10.1167/iovs.05-0609
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发表时间：
2005-12-01
影响因子：
4.4
通讯作者：
Charman, WN
中科院分区：
文献类型：
--
作者：
Montés-Micó, R;Alió, JL;Charman, WN
目的.目的研究眨眼后人眼的调制传递函数（MTF）随时间的变化。一个5毫米瞳孔的距离MTF来自于20名健康年轻受试者在眨眼后的不同时间间隔（1秒至15秒）的双通视网膜图像。这样的测量包括波前像差，散射光，并在焦点上的错误的影响，因此更相关的真实的生活比基于波前误差单独的MTF的估计。最佳MTF的各种标准，发现约6秒后眨眼。结论。包括杂散光和聚焦误差的影响并不影响最佳视网膜图像质量发生在眨眼后一段时间的发现。光学质量的损失似乎不是正常闪烁的触发因素。
PURPOSE. To examine the temporal changes in the modulation transfer function (MTF) of the eye after a blink.METHODS. The distance MTF of a 5-mm pupil was derived from double-pass retinal images in 20 healthy young subjects at various intervals after a blink (1 second up to 15 seconds). Such measurements include the effects of wavefront aberration, scattered light, and errors in focus and are thus more relevant to real life than are estimates of MTF based on wavefront errors alone.RESULTS. Optimal MTF by a variety of criteria was found some 6 seconds after a blink.CONCLUSIONS. Inclusion of the effects of stray light and errors of focus does not affect the finding that optimal retinal image quality occurs some time after a blink. It does not appear that a loss in optical quality is the trigger of normal blinking.