Vingrys A J, Cole B L
Ophthalmic Physiol Opt. 1983;3(2):137-52.
The recently introduced Holmes - Wright Type A and Type B lanterns and the Farnsworth lantern were administered to 100 observers with normal colour vision and 100 observers with defective colour vision. With the fail criteria adopted, all normals passed the Holmes - Wright Type A lantern and with one exception all normals passed the Farnsworth lantern. However, 8% of normals failed the more difficult Holmes - Wright Type B lantern. It is noted that the normals who fail this lantern test appear to do so not because of poor colour discrimination but because the coloured stimuli presented by the lantern have a point brilliance close to the average chromatic threshold. About one-third of the colour vision defective group passed the Farnsworth lantern and between 14 and 17% passed the Holmes - Wright Type A lantern depending on the test procedure used. Only two mild deuteranomals in the sample of 100 colour abnormal observers succeeded in passing the Holmes - Wright Type B lantern. Dichromats and severe anomalous trichromats fail all three lanterns so that those who pass are all mild anomalous trichromats. A significant proportion of protanomals pass the Farnsworth lantern and some protanomals pass the Holmes - Wright Type A lantern despite their reduced sensitivity to red light and correspondingly reduced signal range for red signals.
最近推出的霍姆斯-赖特A型和B型信号灯以及法恩斯沃思信号灯对100名色觉正常的观察者和100名色觉有缺陷的观察者进行了测试。按照所采用的失败标准，所有色觉正常者都通过了霍姆斯-赖特A型信号灯测试，除一人外，所有色觉正常者都通过了法恩斯沃思信号灯测试。然而，8%的色觉正常者未通过难度更大的霍姆斯-赖特B型信号灯测试。值得注意的是，未通过该信号灯测试的色觉正常者似乎并非因为颜色辨别能力差，而是因为信号灯呈现的彩色刺激的点亮度接近平均色阈。约三分之一的色觉有缺陷者通过了法恩斯沃思信号灯测试，根据所使用的测试程序，14%至17%的色觉有缺陷者通过了霍姆斯-赖特A型信号灯测试。在100名色觉异常观察者的样本中，只有两名轻度红色弱患者成功通过了霍姆斯-赖特B型信号灯测试。二色视者和重度异常三色视者未能通过所有三种信号灯测试，因此通过测试的都是轻度异常三色视者。相当一部分红色盲患者通过了法恩斯沃思信号灯测试，一些红色盲患者通过了霍姆斯-赖特A型信号灯测试，尽管他们对红光的敏感度降低，相应地红色信号的信号范围也减小。
