No, myopia is definitely PARTLY heritable. Over 100 regions of the human genome are known to contribute to myopia development. Here is an excellent paper in Na

No, myopia is definitely PARTLY heritable. Over 100 regions of the human genome are known to contribute to myopia development. Here is an excellent paper in Nature Genetics: https://www.nature.com/articles/s41588-020-0599-0 https://www.nature.com/articles/s41588-020-0599-0 But you are right that environmental factors are also critical. Most types of myopia are modulated by gene-by-environmental interactions. Lots of near-work is the number 1 culprit. But susceptibility to near work is a function of your genome.