But is this due to how we use our eyes? I always wondered how it could be that maybe half of everyone I knew in uni used glasses, when you'd think a 20-year old hunter-gatherer would need to be able to see stuff.
Is there research on this? Just wondering since I ended up having issues with nearsightedness in my early 20s but feel like I spent a lot more time outdoors as a child compared to children these days.
There are many possible factors, including genetics, light exposure, amount of time spent on closeup vs distance, and a shortage of vision therapy / behavioral optometry experts.
https://gettingstronger.org/2016/03/faq-for-vision-improveme...