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Our prospective single\u2010center study analysed the changes in ocular axial length (AXL) in a population of Central European schoolchildren from 2016 to 2019. The study included 528 eyes of 264 children with a mean age of 12.2\u2009years at the beginning of the study. Visual acuity, ocular AXL, anterior chamber depth, and the questionnaire were examined at 6\u2010month intervals (in spring and autumn, following the winter and summer periods, respectively). The average ocular AXL was 23.329\u2009mm (median: 23.315\u2009mm) at the beginning of the study and 23.525\u2009mm (median: 23.505\u2009mm) at the end of the study. The change in ocular AXL per month was significantly higher (<jats:italic>p<\/jats:italic> &lt; 0.0001) during the winter period (average: 0.013\u2009mm, median: 0.011\u2009mm) than during the summer period (average: \u22120.001\u2009mm, median: 0.000\u2009mm). We observed a significantly higher increase in ocular AXL in a Caucasian population during the winter period (with lower daylight exposure) than the summer period.<\/jats:p>","DOI":"10.1155\/2023\/2592853","type":"journal-article","created":{"date-parts":[[2023,2,10]],"date-time":"2023-02-10T19:08:23Z","timestamp":1676056103000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Seasonal Variations in Ocular Axial Length Increase among Children in the Czech 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