Ahn S J, Legge G E, Luebker A
Minnesota Laboratory for Low-vision Research, Department of Psychology, University of Minnesota, Minneapolis 55455, USA.
Vision Res. 1995 Jul;35(13):1939-44. doi: 10.1016/0042-6989(94)00294-v.
There is a growing consensus that clinical evaluation of the real-world consequences of eye disease requires new performance-based tests. This is because Snellen acuity and other common clinical tests are often poor predictors of everyday function. Ahn and Legge [(1995) Vision Research, 35, 1931-1938] validated a computerized test of reading speed by showing that it provides an accurate prediction of low-vision reading performance with magnifiers. Here, we describe development of a printed-card version of the test suitable for clinical use. This printed-card test retains key design features of the validated computerized test, including the same set of sentences and display format. Data from 23 low-vision subjects showed that a very simple testing procedure using printed cards and a stop watch could be used effectively to estimate reading speed. Reading speed based on a single card was quite accurate (SD equal to about 18% of the mean) and showed no practice effects from one card to the next. Reading speeds obtained with printed cards correlated highly (r = 0.887) with those from computerized testing. We conclude that a simple test, using printed cards, can be used to obtain useful estimates of low-vision reading speed.
越来越多的人达成共识，即对眼病实际后果的临床评估需要新的基于表现的测试。这是因为斯内伦视力表和其他常见临床测试往往不能很好地预测日常功能。安和莱格（[1995]《视觉研究》，35卷，1931 - 1938页）通过证明计算机化阅读速度测试能准确预测低视力患者使用放大镜时的阅读表现，验证了该测试。在此，我们描述了一种适用于临床使用的印刷卡片版测试的开发情况。这种印刷卡片测试保留了经过验证的计算机化测试的关键设计特征，包括相同的句子集和显示格式。来自23名低视力受试者的数据表明，使用印刷卡片和秒表的非常简单的测试程序可以有效地用于估计阅读速度。基于单张卡片的阅读速度相当准确（标准差约为平均值的18%），并且从一张卡片到下一张卡片没有练习效应。印刷卡片获得的阅读速度与计算机化测试获得的阅读速度高度相关（r = 0.887）。我们得出结论，使用印刷卡片的简单测试可用于获得低视力阅读速度的有用估计值。
