Then you would expect darker regions of the world which have lower serum levels of vitamin D to have more sight problems, I don’t think that’s the case.
I’d actually look at the vision of people with dark skin who now reside in northern latitudes. Typically that is the most vitamin D deficient population, since their melanin levels are tuned for more intense sunlight than their current location provides.
Then you would expect darker regions of the world which have lower serum levels of vitamin D to have more sight problems, I don’t think that’s the case.
I’d actually look at the vision of people with dark skin who now reside in northern latitudes. Typically that is the most vitamin D deficient population, since their melanin levels are tuned for more intense sunlight than their current location provides.