Assessing the reliability, discriminative ability, and validity of disability glare tests.
Assessing the reliability, discriminative ability, and validity of disability glare tests.
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DOI：
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发表时间：
1993
影响因子：
4.4
通讯作者：
D. Elliott;M. Bullimore
中科院分区：
文献类型：
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作者：
D. Elliott;M. Bullimore
目的收集失能眩光测试的信度、辨别能力和效度的相关信息。方法采用Miller-Nadler、Vistech MCT 8000、Berkeley、货车den贝格杂散光仪和Pelli-Robson和Regan视力表联合使用的亮度敏锐度测试仪进行眩光测试。使用三个测试评价标准：（1）可重复性-比较两次访问的测试分数;（2）辨别能力-区分年轻和老年受试者以及老年正常和白内障受试者的测试能力;（3）有效性-将白内障测试分数与货车den贝格散光计的参考标准进行比较。评估了三个受试者组：年轻正常人（n = 24，平均年龄24.3 ± 3.3岁），老年正常人（n = 22，平均年龄66.0 ± 6.2岁）和早期白内障（n = 33，平均年龄70.6 ± 8.1岁）。结果和结论数据表明，在眩光存在下测量的对比敏感度或低对比敏锐度在评估神经功能正常的白内障患者时优于失能眩光评分上级。在眩光条件下，对比敏感度和低对比敏锐度评分的Pelli-Robson，里根和伯克利测试提供了类似的可靠，区分，有效的措施，白内障的视觉评估。Miller-Nadler眩光测试仪在低对比度阈值时步长较大，因此无法检测和测量眼介质的细微变化，例如早期白内障。Vistech MCT 8000的可靠性较差，限制了其实用性。这项研究表明，除非使用良好的图表设计和心理物理学，眩光源的几何形状和强度是不重要的。
PURPOSE To gather information regarding the reliability, discriminative ability, and validity of disability glare tests. METHODS The following glare tests were evaluated: the Miller-Nadler, Vistech MCT8000, Berkeley, van den Berg Straylightmeter, and the Brightness Acuity Tester used with the Pelli-Robson and Regan charts. Three test evaluation criteria were used: (1) repeatability--comparing test scores on two visits; (2) discriminative ability--the tests' ability to differentiate between young and old subjects and between old normal and cataract subjects; (3) validity--comparing cataract test scores with the reference standard of the van den Berg Straylightmeter. Three subject groups were evaluated: young normals (n = 24, mean age 24.3 +/- 3.3 yr), older normals (n = 22, mean age 66.0 +/- 6.2 yr), and early cataract (n = 33, mean age 70.6 +/- 8.1 yr). RESULTS AND CONCLUSIONS Data indicate that contrast sensitivity or low contrast acuity measured in the presence of glare are superior to disability glare scores in assessing cataract patients with normal neural function. Under glare conditions, contrast sensitivity and low contrast acuity scores from the Pelli-Robson, Regan, and Berkeley tests provide similarly reliable, discriminative, and valid measures of visual assessment in cataract. The Miller-Nadler glare tester poorly detects and measures subtle changes in the ocular media, such as early cataract, because of its large step sizes at low contrast thresholds. The poor reliability of the Vistech MCT8000 limits its usefulness. The study suggests that unless good chart design and psychophysics are used, the geometry and intensity of the glare source are of little importance.