Kruger P B
Am J Optom Physiol Opt. 1977 Jul;54(7):445-51. doi: 10.1097/00006324-197707000-00003.
A previous study using photoelectric retinoscopy at near showed an increase in fundus reflex luminance when the subject's task was changed from reading simple material to adding numbers. Unfortunately, it was not possible to attribute the luminance change to the change in cognitive task. The present experiment was designed to determine whether an increase in cognitive processing would produce an increase in fundus reflex luminance. When the subjects (N = 19, ages 22 to 27) changed from viewing 2-digit numbers at 40 cm to adding the digits, with no change in the visual stimulus, the increased in 47 of 54 trials--the mean luminance increased approximately 10% (p less than 0.01). This change in fundus reflex luminance is not attributed to change in eye position but rather to a decrease in accommodative lag.
之前一项使用近视力光电视网膜镜检查的研究表明，当受试者的任务从阅读简单材料变为做加法运算时，眼底反射亮度会增加。遗憾的是，无法将亮度变化归因于认知任务的改变。本实验旨在确定认知加工的增加是否会导致眼底反射亮度增加。当受试者（N = 19，年龄在22至27岁之间）在40厘米处从观看两位数变为将这些数字相加，视觉刺激无变化时，54次试验中有47次亮度增加——平均亮度增加约10%（p < 0.01）。眼底反射亮度的这种变化并非归因于眼睛位置的改变，而是由于调节滞后的减少。
