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However, its mechanism has not been elucidated. This study aimed to investigate the main wavelength of light causing photophobia in IRD and difference among patients with different phenotypes. Forty-seven retinitis pigmentosa (RP) and 22 cone-rod dystrophy (CRD) patients were prospectively recruited. We designed two tinted glasses: short wavelength filtering (SWF) glasses and middle wavelength filtering (MWF) glasses. We classified photophobia into three types: (A) white out, (B) bright glare, and (C) ocular pain. Patients were asked to assign scores between one (not at all) and five (totally applicable) for each symptom with and without glasses. In patients with RP, photophobia was better relieved with SWF glasses {\u201cwhite out\u201d (p\u2009&lt;\u20090.01) and \u201cocular pain\u201d (p\u2009=\u20090.013)}. In CRD patients, there was no significant difference in the improvement wearing two glasses (p\u2009=\u20090.247\u20131.0). All RP patients who preferred MWF glasses had Bull\u2019s eye maculopathy. Meanwhile, only 15% of patients who preferred SWF glasses had the finding (p\u2009&lt;\u20090.001). Photophobia is primarily caused by short wavelength light in many patients with IRD. However, the wavelength responsible for photophobia vary depending on the disease and probably vary according to the pathological condition.<\/jats:p>","DOI":"10.1038\/s41598-020-71707-2","type":"journal-article","created":{"date-parts":[[2020,9,10]],"date-time":"2020-09-10T11:26:39Z","timestamp":1599737199000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Wavelength of light and photophobia in inherited retinal dystrophy"],"prefix":"10.1038","volume":"10","author":[{"given":"Yuki","family":"Otsuka","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Akio","family":"Oishi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Manabu","family":"Miyata","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maho","family":"Oishi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomoko","family":"Hasegawa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shogo","family":"Numa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hanako Ohashi","family":"Ikeda","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Akitaka","family":"Tsujikawa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2020,9,9]]},"reference":[{"key":"71707_CR1","doi-asserted-by":"publisher","first-page":"6","DOI":"10.1167\/tvst.7.4.6","volume":"7","author":"JL Duncan","year":"2018","unstructured":"Duncan, J. 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Otsuka, None; A. Oishi, grant from Tokai Optical Co., Ltd.; M. Miyata, None; M. Oishi, None; T. Hasegawa, None; S. Numa, None; H. O. Ikeda, None; A. Tsujikawa, grant from Canon (Tokyo, Japan) and JFC sales (Tokyo, Japan), and personal fee from Canon and Nidek (Gamagori, Japan).","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"14798"}}