TL;DR: Myopia can be staved off by spending more time outside. Unfortunately, accelerating climate change will mean that fewer people will be able to thrive outdoors for extended periods. I hope things like full-spectrum indoor light sources paired with larger screens or projected images 10+ feet away can allow people to regain some of sunlight's benefits without having to contend with scorching temperatures.
I suffer from horrible myopia. I've been an indoorsy bookworm and techie for most of my life and had my first pair of glasses at age 9. Now that I'm almost 50, my eyes are atrocious.