Medina J M, Jiménez J R, Jiménez del Barco L
Department of Optics, University of Granada, Granada, Spain.
Curr Eye Res. 2003 Jun;26(6):327-34. doi: 10.1076/ceyr.26.5.327.15434.
To determine the influence of retinal illuminance on monocular or binocular visual reaction time (VRT).
On two normal subjects, uniform circular stimuli were presented with respect to a reference stimulus at the fovea under suprathreshold conditions, and the detection of positive and negative luminance variations was recorded. Binocular and monocular reaction times were measured (by the index finger pressing on a mouse key) for viewing with both natural and artificial pupils.
Binocular reaction times were shorter than monocular reaction times; nevertheless, this binocular-summation effect was less marked in trials with the artificial pupil. Analyses of binocular-summation ratios for contrast changes for both pupil types indicated maximum and minimum binocular-saturation values depending on contrast variations in both positive and negative luminance changes.
Binocular summation can be influenced by pupil size under suprathreshold conditions. Results are discussed in terms of retinal illuminance and cortical pupil response mechanisms.
确定视网膜照度对单眼或双眼视觉反应时间（VRT）的影响。
在两名正常受试者中，在阈上条件下相对于中央凹处的参考刺激呈现均匀圆形刺激，并记录对正、负亮度变化的检测情况。测量了自然瞳孔和人工瞳孔观察时的双眼和单眼反应时间（通过食指按压鼠标键）。
双眼反应时间比单眼反应时间短；然而，在人工瞳孔试验中，这种双眼总和效应不太明显。对两种瞳孔类型的对比度变化的双眼总和比率分析表明，根据正、负亮度变化中的对比度变化，存在最大和最小双眼饱和度值。
在阈上条件下，双眼总和可受瞳孔大小影响。根据视网膜照度和皮质瞳孔反应机制对结果进行了讨论。
