Modulation of cortical activity by spherical blur and its correlation with retinal defocus
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...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-07-01
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| Series: | Frontiers in Neuroscience |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fnins.2023.1184381/full |
| _version_ | 1797781709839663104 |
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| author | Yannis Chenguiti Yannis Chenguiti Samy Hamlaoui Konogan Baranton Satoru Otani Elisa M. Tartaglia |
| author_facet | Yannis Chenguiti Yannis Chenguiti Samy Hamlaoui Konogan Baranton Satoru Otani Elisa M. Tartaglia |
| author_sort | Yannis Chenguiti |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-13T00:00:53Z |
| format | Article |
| id | doaj.art-64ed8b0105f34e1080da013f552c8de8 |
| institution | Directory Open Access Journal |
| issn | 1662-453X |
| language | English |
| last_indexed | 2024-03-13T00:00:53Z |
| publishDate | 2023-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Neuroscience |
| spelling | doaj.art-64ed8b0105f34e1080da013f552c8de82023-07-13T11:26:46ZengFrontiers Media S.A.Frontiers in Neuroscience1662-453X2023-07-011710.3389/fnins.2023.11843811184381Modulation of cortical activity by spherical blur and its correlation with retinal defocusYannis Chenguiti0Yannis Chenguiti1Samy Hamlaoui2Konogan Baranton3Satoru Otani4Elisa M. Tartaglia5Center of Innovation and Technologies Europe, Essilor International, SAS, Charenton-le-Pont, FranceSorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, FranceCenter of Innovation and Technologies Europe, Essilor International, SAS, Charenton-le-Pont, FranceCenter of Innovation and Technologies Europe, Essilor International, SAS, Charenton-le-Pont, FranceSorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, FranceCenter of Innovation and Technologies Europe, Essilor International, SAS, Charenton-le-Pont, FranceCortical 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.https://www.frontiersin.org/articles/10.3389/fnins.2023.1184381/fullsharpness of visual perceptionEEGspherical blurretinal defocusretinal image qualityeye model |
| spellingShingle | Yannis Chenguiti Yannis Chenguiti Samy Hamlaoui Konogan Baranton Satoru Otani Elisa M. Tartaglia Modulation of cortical activity by spherical blur and its correlation with retinal defocus Frontiers in Neuroscience sharpness of visual perception EEG spherical blur retinal defocus retinal image quality eye model |
| title | Modulation of cortical activity by spherical blur and its correlation with retinal defocus |
| title_full | Modulation of cortical activity by spherical blur and its correlation with retinal defocus |
| title_fullStr | Modulation of cortical activity by spherical blur and its correlation with retinal defocus |
| title_full_unstemmed | Modulation of cortical activity by spherical blur and its correlation with retinal defocus |
| title_short | Modulation of cortical activity by spherical blur and its correlation with retinal defocus |
| title_sort | modulation of cortical activity by spherical blur and its correlation with retinal defocus |
| topic | sharpness of visual perception EEG spherical blur retinal defocus retinal image quality eye model |
| url | https://www.frontiersin.org/articles/10.3389/fnins.2023.1184381/full |
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