Hovis J K, Oliphant D
School of Optometry, University of Waterloo, ON, Canada.
Vision Res. 1998 Nov;38(21):3487-91. doi: 10.1016/s0042-6989(98)00054-6.
A simulated field test was designed to determine whether the Holmes-Wright A lantern (HWA) is a valid color vision test for the rail industry. The simulation replicated viewing rail signal lights at 0.8 km distance under daylight conditions. Using the worst-normal as the maximum number of allowable errors on the simulation, 94% of the color-defectives failed both tests on the first trial and 92% failed at the second session. The HWA had a higher false negative rate than a false alarm rate. The majority of individuals who had discrepancies on the two tests were mild deutans. Results from the Ishihara test were marginally better at predicting performance on the simulation.
设计了一项模拟现场测试，以确定霍姆斯-赖特A型信号灯（HWA）是否是铁路行业有效的色觉测试。该模拟重现了在日光条件下800米距离处观看铁路信号灯的情况。以最坏正常情况作为模拟中允许的最大错误数，94%的色觉缺陷者在第一次试验中两项测试均未通过，92%的人在第二次测试中未通过。HWA的假阴性率高于误报率。在两项测试中存在差异的大多数人是轻度绿色盲患者。石原氏测试在预测模拟测试表现方面的结果略好。
