Elliott D B, Situ P
Department of Optometry, University of Bradford, UK.
Vision Res. 1998 Jun;38(13):2047-52. doi: 10.1016/s0042-6989(97)00382-9.
Large and small letter contrast sensitivity and visual acuity were assessed in 37 elderly eyes (mean VA -0.01 logMAR, Snellen 6/6) and their lens opacities were categorised and graded using the LOCS III system. Large letter contrast sensitivity was often not reduced in cataract from age-matched normal values and provided limited information. Small letter contrast sensitivity was shown to be a more sensitive measure of early cataract than visual acuity and large letter contrast sensitivity. Its usefulness may be limited by its strong correlation with visual acuity (r2 = 0.70), which is the standard and traditional measure of vision in cataract.
对37只老年眼睛（平均视力-0.01 logMAR，斯内伦视力6/6）的大小写字母对比敏感度和视力进行了评估，并使用LOCS III系统对其晶状体混浊进行了分类和分级。与年龄匹配的正常数值相比，白内障患者的大写字母对比敏感度通常并未降低，且提供的信息有限。小写字母对比敏感度被证明是比视力和大写字母对比敏感度更敏感的早期白内障测量指标。其有用性可能因其与视力的强相关性（r2 = 0.70）而受到限制，视力是白内障中标准且传统的视力测量指标。
