A COMPARISON OF CLINICAL ACUITY AND CONTRAST SENSITIVITY CHARTS - EFFECT OF UNCORRECTED MYOPIA
A COMPARISON OF CLINICAL ACUITY AND CONTRAST SENSITIVITY CHARTS - EFFECT OF UNCORRECTED MYOPIA
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DOI：
10.1111/j.1475-1313.1991.tb00536.x
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发表时间：
1991-07-01
影响因子：
2.9
通讯作者：
HAESEKER, J
中科院分区：
文献类型：
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作者：
BRADLEY, A;HOOK, J;HAESEKER, J
我们使用标准视力表和两种市售的印刷对比敏感度表（Vistech和Pelli-Robson）检查了矫正和未矫正近视对视力和对比敏感度的影响。 我们测试了70名年轻人的140只眼睛。 大多数受试者都是近视眼，并在佩戴和不佩戴最佳眼镜或接触透镜矫正的情况下进行测试。 我们发现，如果近视矫正得好，对视力或对比敏感度没有影响。 所有三个测试分数都对未矫正的近视敏感。 Pelli-Robson对比敏感度表被设计为对散焦不敏感，需要超过三个屈光度的屈光不正才能引起性能的两条线变化，并且它通常对未矫正的近视非常不敏感。 虽然Vistech视力表对未矫正的近视敏感，但视力表中使用的步长较大，受试者间和受试者内评分的变异性较高，降低了其屈光的潜在价值。 Snellen字母表给出了未矫正近视的最敏感和最可靠的表现变化。
We have examined the effect of corrected and uncorrected myopia on visual acuity and contrast sensitivity using a standard acuity chart and two commercially available printed contrast sensitivity charts (Vistech and Pelli-Robson). We tested 140 eyes of 70 young adults. Most subjects were myopic and were tested with and without their optimum spectacle or contact lens correction. We found no effect of myopia, if well corrected, on acuity or contrast sensitivity. All three test scores were sensitive to uncorrected myopia. The Pelli-Robson contrast sensitivity chart, which was designed to be insensitive to defocus, required more than three diopters of refractive error to elicit a two line change in performance, and it was generally very insensitive to uncorrected myopia. Although the Vistech chart was sensitive to uncorrected myopia, the large step sizes used in the chart, and the higher inter- and intra-subject variability in scores reduces its potential value for refraction. The Snellen letter chart gave the most sensitive and reliable changes in performance with uncorrected myopia.