I have found this article which claims (for chicken) that blocking outdoors UV light made myopia worse.
Some kids require glasses from a young age, e.g. 6 years old. Most of these glasses do have UV filter on their lenses. Another study claims that the younger the patient is when the onset of myopia the worse their outcome is.
The question: is it possible that the lack of outdoors UV light at a young age causes the worsening of myopia? If so, would glasses with no UV blocker be a better alternative for kids?