Effect of small focal errors on vision
Effect of small focal errors on vision
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DOI：
10.1097/00006324-199707000-00020
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发表时间：
1997-07-01
影响因子：
1.4
通讯作者：
Griffiths, AC
中科院分区：
文献类型：
--
作者：
Miller, AD;Kris, MJ;Griffiths, AC
目的。本研究的目的是量化小正焦误差对习惯佩戴不矫正眼镜或仅佩戴低倍远距离矫正眼镜的佩戴者视力质量的影响。方法。在为期 2 天的试戴期间，患者佩戴的眼镜故意包含一些小误差；还使用简短的主观问卷和一些视觉功能的实验室测量来评估这些聚焦误差的影响。结果。许多佩戴者注意到球面和柱面远视力的焦距误差小至 +0.25 D，并且对此感到不满意。结论。这一发现支持将屈光度细化至最接近的 0.25 D 的临床实践。它表明，对于关键应用和关键患者，应采用稍微欠矫正远视的做法，以便患者可以使用一点自己的调节来获得最佳远视力。
Purpose. The aim of this study was to quantify the effects of small plus focal errors on the quality of vision of wearers who habitually wear either no correction, or a low powered, distance only correction. Methods. Patients wore spectacles with small errors deliberately included for a 2-day trial wear period; a short subjective questionnaire, and some laboratory measures of visual function were also used to assess the effects of these focus errors. Results. A significant number of wearers notice, and are dissatisfied with, focal errors in distance vision as small as +0.25 D, in both sphere and cylinder. Conclusion. This finding supports clinical practice in refining the refraction to the nearest 0.25 D. It suggests that for critical applications and for critical patients, the practice of slightly undercorrecting hypermetropes should be applied, so that patients can use a little of their own accommodation for optimal distance vision.