Myopia is considered a highly heritable condition. See sources 12-17 on this paper as a starting point https://pmc.ncbi.nlm.nih.gov/articles/PMC8947159/#B12-chi

Myopia is considered a highly heritable condition. See sources 12-17 on this paper as a starting point https://pmc.ncbi.nlm.nih.gov/articles/PMC8947159/#B12-children-09-00382 https://pmc.ncbi.nlm.nih.gov/articles/PMC8947159/#B12-childr... That does not mean that there is no environmental factor, but it does mean there is a genetic factor.