4 ms·

I read that vitamin d deficiency might be related to myopia. It seems controversial though.

• Johanx64 3y ago
  Nothing controversial, but it is more likely a correlation, not causation. If you're vitamin d deficient, that means you're not spending time outdoors (in the sun). If you're not spending time outdoors, it probably means you're focusing your vision on short-distance objects, like screens and books. Which naturally leads to myopia for most people. Obviously, vitamin D supplementation is highly unlikely to do anything to improve the condition, because vitamin D deficiency is just a symptom. Similarly seasonal affective disorder is also very rarely improved by vitamin D supplementation alone.