Khan S G, Chen K F, Frenkel M
Arch Ophthalmol. 1976 Dec;94(12):2086-91. doi: 10.1001/archopht.1976.03910040746009.
The Catford apparatus for determining the objective visual acuity was elevated with 20 normal (20 eyes) and 40 abnormal (75 diseased eyes) patients. The vision of the normal individuals was fogged with neutral-density filters and convex lenses. Eyes with normal or near normal vision showed good correlation between optokinetic response and visual acuity, but no correlation was observed in eyes with poor vision. These findings, which vary from those of Catford, indicate that objective methods of visual acuity testing using a nystagmoid response do not appear useful for general clinical purposes.
用于测定客观视力的卡特福德仪器在20名正常（20只眼）和40名异常（75只患病眼）患者中进行了测试。正常个体的视力通过中性密度滤光片和凸透镜进行模糊处理。视力正常或接近正常的眼睛在视动反应和视力之间显示出良好的相关性，但视力较差的眼睛未观察到相关性。这些与卡特福德的研究结果不同的发现表明，使用眼球震颤样反应进行客观视力测试的方法似乎对一般临床目的并无用处。
