Appl Opt. 2022 Mar 20;61(9):2438-2443. doi: 10.1364/AO.453842.
Disability glare is defined as the loss of contrast sensitivity of the retinal image due to intraocular straylight originated from the presence of an intense and broad bright light in the field of vision. This loss of vision can range between vision loss at high spatial frequencies or total temporal blindness. If the extreme case occurs, the recovery time is crucial in night driving conditions or those professional activities in which maximum visual acuity is required at any moment. The recovery time depends mainly on the intensity and glare angle of the light source, ocular straylight, and the photoreceptor response at the retina. The recovery time can also be affected by ocular pathologies, aging, or physiological factors that increase ocular straylight. The aim of this work is to develop a new optical instrument based on psychophysical methodology as well as to investigate the recovery time from total disability glare (photobleaching) as a function of the contrast of the visual target and the glare angle of the source in healthy volunteers. Results showed significant exponential correlation between recovery time and contrast of the visual target and linear correlation between contrast sensitivity and the glare angle. Those findings allowed to obtain an empirical expression to compute the recovery time required to restore contrast sensitivity baseline vision after photobleaching. Finally, a statistical dependence of recovery time with age was found for short glare angles that disappear as the glare angle increases.
障碍性耀光定义为由于视野中强光的存在而引起的眼内杂散光，导致视网膜图像对比度敏感度降低。这种视力损失范围从高空间频率的视力丧失到完全的时间失明。如果出现极端情况，在夜间驾驶条件或任何时刻都需要最大视力的专业活动中，恢复时间至关重要。恢复时间主要取决于光源的强度和耀眼光角度、眼内杂散光以及视网膜上的光感受器反应。恢复时间还可能受到眼部病变、衰老或增加眼内杂散光的生理因素的影响。这项工作的目的是开发一种基于心理物理学方法的新型光学仪器，并研究健康志愿者从完全障碍性耀光（光漂白）中恢复的时间，作为视觉目标对比度和光源耀眼光角度的函数。结果表明，恢复时间与视觉目标对比度之间存在显著的指数相关关系，而对比度灵敏度与耀眼光角度之间存在线性相关关系。这些发现允许获得一个经验表达式，以计算在光漂白后恢复对比度灵敏度基线视力所需的恢复时间。最后，发现恢复时间与年龄存在统计依赖性，对于短耀眼光角度，这种依赖性会随着耀眼光角度的增加而消失。
