Domínguez-Vicent Alberto, Helghe Emma, Wahlberg Ramsay Marika, Venkataraman Abinaya Priya
Division of Eye and Vision, Department of Clinical Neuroscience, Karolinska Institute, Solna, Sweden.
Front Psychol. 2021 Nov 8;12:772661. doi: 10.3389/fpsyg.2021.772661. eCollection 2021.
The aim of this study was to evaluate the effect of four different filters on contrast sensitivity under photopic and mesopic conditions with and without glare. A forced choice algorithm in a Bayesian psychophysical procedure was utilized to evaluate the spatial luminance contrast sensitivity. Five different spatial frequencies were evaluated: 1.5, 3, 6, 12, and 18 cycles per degree (cpd). The measurements were performed under 4 settings: photopic and mesopic luminance with glare and no glare. Two long pass filters (LED light reduction and 511nm filter) and two selective absorption filters (ML41 and emerald filter) and a no filter condition were evaluated. The measurements were performed in 9 young subjects with healthy eyes. For the no filter condition, there was no difference between glare and no glare settings for the photopic contrast sensitivity measurements whereas in the mesopic setting, glare reduced the contrast sensitivity significantly at all spatial frequencies. There was no statistically significant difference between contrast sensitivity measurements obtained with different filters under both photopic conditions and the mesopic glare condition. In the mesopic no glare condition, the contrast sensitivity at 6 cpd with 511, ML41 and emerald filters was significantly reduced compared to no filter condition ( = 0.045, 0.045, and 0.071, respectively). Similarly, with these filters the area under the contrast sensitivity function in the mesopic no glare condition was also reduced. A significant positive correlation was seen between the filter light transmission and the average AULCSF in the mesopic non-glare condition. The contrast sensitivity measured with the filters was not significantly different than the no filter condition in photopic glare and no glare setting as well as in mesopic glare setting. In mesopic setting with no glare, filters reduced contrast sensitivity.
本研究的目的是评估四种不同滤光片在明视觉和 mesopic 条件下，有眩光和无眩光时对对比敏感度的影响。在贝叶斯心理物理学程序中使用强制选择算法来评估空间亮度对比敏感度。评估了五个不同的空间频率：每度 1.5、3、6、12 和 18 周/度（cpd）。测量在四种设置下进行：有眩光和无眩光的明视觉和 mesopic 亮度。评估了两种长波通滤光片（LED 光减少和 511nm 滤光片）、两种选择性吸收滤光片（ML41 和祖母绿滤光片）以及无滤光片条件。对 9 名眼睛健康的年轻受试者进行了测量。对于无滤光片条件，在明视觉对比敏感度测量中，有眩光和无眩光设置之间没有差异，而在 mesopic 设置中，眩光在所有空间频率下均显著降低了对比敏感度。在明视觉条件和 mesopic 眩光条件下，使用不同滤光片获得的对比敏感度测量之间没有统计学上的显著差异。在 mesopic 无眩光条件下，与无滤光片条件相比，使用 511、ML41 和祖母绿滤光片时，6 cpd 处的对比敏感度显著降低（分别为 = 0.045、0.045 和 0.071）。同样，使用这些滤光片时，mesopic 无眩光条件下对比敏感度函数下的面积也减小了。在 mesopic 无眩光条件下，滤光片的光透射率与平均 AULCSF 之间存在显著正相关。在明视觉眩光和无眩光设置以及 mesopic 眩光设置中，使用滤光片测量的对比敏感度与无滤光片条件没有显著差异。在 mesopic 无眩光设置中，滤光片降低了对比敏感度。
