Jenkins T C, Douthwaite W A
Department of Optometry, Bradford University, United Kingdom.
Am J Optom Physiol Opt. 1988 Dec;65(12):957-61. doi: 10.1097/00006324-198812000-00007.
Visual acuity was estimated by making amplitude measurements of the transient visually evoked response (VER) wave to pattern reversal using check sizes of 5.5, 7.5, 8.5, and 9.5 min arc. As in previous studies the 5.5 min arc check produced a response which reflected the visual acuity of the high acuity subjects, but often failed to produce a VER wave at the low acuity end. The proposal is made that where the 5.5 min arc check produces an acceptable wave (amplitude greater than 1.5 microV) then the regression line for the 5.5 check can be used to predict visual acuity. Where the VER amplitude is below 1.5 microV for this small check size then a second recording must be made using the 9.5 min arc check and the visual acuity predicted from the 9.5 check regression line.
通过对使用5.5、7.5、8.5和9.5分视角的方格大小进行图案反转的瞬态视觉诱发电位（VER）波进行幅度测量来估计视力。与之前的研究一样，5.5分视角的方格产生的反应反映了高视力受试者的视力，但在低视力端往往无法产生VER波。建议如下：如果5.5分视角的方格产生可接受的波（幅度大于1.5微伏），那么5.5方格的回归线可用于预测视力。如果对于这个小方格大小，VER幅度低于1.5微伏，则必须使用9.5分视角的方格进行第二次记录，并根据9.5方格的回归线预测视力。
