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The new numbers contrast sensitivity chart for contrast sensitivity measurement

机译：用于对比灵敏度测量的新数字对比灵敏度图表

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Purpose: To develop and assess the agreement between the 3 newly made numbers contrast sensitivity charts and the MARS contrast sensitivity chart (MARS) in contrast sensitivity measurement. Methods: We developed 3 numbers contrast sensitivity charts for right, left and both eyes. Two hundred subjects were assigned to read numbers 0-9 for determining the degree of difficulty. Selected seven numbers were randomly arranged and the contrast of each number was decreased by the constant factor of 0.04 log units in the units as in the MARS. We assigned 112 subjects with visual acuity range from 20/480 to 20/20 to test once with the new chart and then with MARS Chart monocularly and binocularly by random order. Bland-Altman analysis for comparing two charts was performed. Results: Bland-Altman analysis between 2 charts showed the mean differences were 0.04, 0.03, 0.04 log CS and the 95% limit of agreement (LOA) of the bias were (+0.26, -0.19), (+0.26, -0.20), (+0.25, -0.17) log CS for right, left and binocular. The Bland-Altman plot indicates a good concordance in 3 charts. Conclusions: These charts show reasonable agreement and can be used interchangeably with the MARS. It is helpful for Thai people who can only read numbers in doing the test. We can use them in routinely contrast sensitivity measurement.
机译：目的：在对比敏感度测量中，开发和评估3个新制作的数字对比敏感度图表与MARS对比敏感度图表（MARS）之间的一致性。方法：我们为左右眼和双眼开发了3个数字的对比敏感度图表。分配了200名受试者阅读数字0-9，以确定难度。随机排列选定的七个数字，每个数字的对比度以与MARS相同的单位降低0.04 log单位的常数因子。我们分配了112位视力范围从20/480到20/20的受试者，以新图表进行一次测试，然后以随机顺序单眼和双眼使用MARS图表进行测试。进行了用于比较两个图表的Bland-Altman分析。结果：两张图表之间的Bland-Altman分析显示，平均差异为0.04、0.03、0.04 log CS，偏倚的95％一致性极限（LOA）为（+ 0.26，-0.19），（+ 0.26，-0.20） ，（+0.25，-0.17）log CS代表左右，双眼。 Bland-Altman图在3个图表中显示出良好的一致性。结论：这些图表显示出合理的一致性，可以与MARS互换使用。这对于只能在考试中读取数字的泰国人很有帮助。我们可以在常规对比敏感度测量中使用它们。

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