This was a simple question I had the other day.
As there is alot of talk about getting outside and the importance of getting outside.
But why? Why is getting outside the best thing for myopia prevention and reversal.
Obv. using distance vision.
Obv. getting natural light.
But what are the elements / factors outside that cause myopia to reduce or reverse.
So firstly. The associational evidence of going outside and myopia prevention is CLEAR. Go outside!
Thats what all the literature says.
What I can’t find, I have to say I didn’t look very hard, is research showing what causes preention and reversal.
My first attempt. Look at Vitamin D. There’s alot of talk atm in other threads about the benefits of Vitamin D. Its awesome. Cures everything etc.
My question: Is vitamin D causal in myopia reversal?
The answer atm: Maybe. At the moment No.
Below are the papers I had a skim through with quick notes. I’ve separated them into causal and associational research.
Associational with little to no causal
Lower 25(OH)D concentration in serum was associated with longer AL and a higher risk of myopia in these young children. This effect appeared independent of outdoor exposure and may suggest a more direct role for 25(OH)D in myopia pathogenesis