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Using a so-called foveascope, we found that for a cohort of 30 normal adults, the two blue cone-free areas at the centre of the foveas are asymmetrical. The noise-stimulated afterimage dominant eye introduced here corresponds to the circular blue cone-free area, while the non-dominant eye corresponds to the diffuse and irregular elliptical outline. By contrast, we found that this asymmetry is absent or frustrated in a similar cohort of 30 adults with normal ocular status, but with dyslexia, i.e. with visual and phonological deficits. In this case, our results show that the two Maxwell centroid outlines are both circular but lead to an undetermined afterimage dominance with a coexistence of primary and mirror images. The interplay between the lack of asymmetry and the development in the neural maturation of the brain pathways suggests new implications in both fundamental and biomedical sciences.<\/jats:p>","DOI":"10.1098\/rspb.2017.1380","type":"journal-article","created":{"date-parts":[[2017,10,18]],"date-time":"2017-10-18T05:10:20Z","timestamp":1508303420000},"page":"20171380","update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":27,"title":["Left-right asymmetry of the Maxwell spot centroids in adults without and with dyslexia"],"prefix":"10.1098","volume":"284","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4516-9817","authenticated-orcid":false,"given":"Albert","family":"Le Floch","sequence":"first","affiliation":[{"name":"Laboratoire de Physique des Lasers, UFR SPM, Universit\u00e9 de Rennes 1, 35042 Rennes, France"},{"name":"Laboratoire d'Electronique Quantique et Chiralit\u00e9s, 20 Square Marcel Bouget, 35700 Rennes, France"},{"name":"Universit\u00e9 Bretagne Loire, 35044 Rennes, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guy","family":"Ropars","sequence":"additional","affiliation":[{"name":"Laboratoire de Physique des Lasers, UFR SPM, Universit\u00e9 de Rennes 1, 35042 Rennes, France"},{"name":"Universit\u00e9 Bretagne Loire, 35044 Rennes, France"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"175","published-online":{"date-parts":[[2017,10,18]]},"reference":[{"key":"e_1_3_7_2_2","doi-asserted-by":"publisher","DOI":"10.1152\/jn.1963.26.6.1003"},{"key":"e_1_3_7_3_2","doi-asserted-by":"publisher","DOI":"10.1038\/nature04169"},{"key":"e_1_3_7_4_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1195320"},{"key":"e_1_3_7_5_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1183962"},{"key":"e_1_3_7_6_2","doi-asserted-by":"publisher","DOI":"10.1038\/nature13154"},{"key":"e_1_3_7_7_2","first-page":"2012","article-title":"Human optic nerve fiber count and optic disc size","volume":"33","author":"Jonas JB","year":"1992","journal-title":"Invest. 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