> dopamine has the effect of stopping the eyeball from growing longer, w
Bilberry has been proven for this.
If dopamine prevented myopia ADHD people on Adderall would not develop myopia. I'm aware that medical prescription correlates with symptoms are not public nor analysed but still that's a big if
Not sure if dopamine build-up in the striatum (or whatever the specific effect of dopaminergic amphetamines is) would be of any relevance. Could be a separate area of the brain, e.g. only specific to the visual system. Dopamine agonists reviewed in this journal article: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5653403/
