Chenguiti Yannis, Hamlaoui Samy, Baranton Konogan, Otani Satoru, Tartaglia Elisa M
Center of Innovation and Technologies Europe, Essilor International, SAS, Charenton-le-Pont, France.
Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France.
Front Neurosci. 2023 Jul 13;17:1184381. doi: 10.3389/fnins.2023.1184381. eCollection 2023.
Cortical activity, as recorded via electroencephalography, has been linked to the refractive error of an individual. It is however unclear which optical metric modulates this response. Here, we measured simultaneously the brain activity and the retinal defocus of a visual stimulus perceived through several values of spherical blur. We found that, contrary to the existing literature on the topic, the cortical response as a function of the overcorrections follows a sigmoidal shape rather than the classical bell shape, with the inflection point corresponding to the subjective refraction and to the stimulus being in focus on the retina. However, surprisingly, the amplitude of the cortical response does not seem to be a good indicator of how much the stimulus is in or out of focus on the retina. Nonetheless, the defocus is not equivalent to the retinal image quality, nor is an absolute predictor of the visual performance of an individual. Simulations of the retinal image quality seem to be a powerful tool to predict the modulation of the cortical response with the refractive error.
通过脑电图记录的皮层活动与个体的屈光不正有关。然而，尚不清楚哪种光学指标调节这种反应。在这里，我们同时测量了通过几个球面模糊值感知的视觉刺激的大脑活动和视网膜离焦。我们发现，与该主题的现有文献相反，作为过矫正函数的皮层反应呈S形，而不是经典的钟形，其拐点对应于主观验光和视网膜上聚焦的刺激。然而，令人惊讶的是，皮层反应的幅度似乎并不是刺激在视网膜上聚焦或离焦程度的良好指标。尽管如此，离焦并不等同于视网膜图像质量，也不是个体视觉表现的绝对预测指标。视网膜图像质量的模拟似乎是预测屈光不正对皮层反应调节的有力工具。
