Wear sunglasses at all times when you're outside
I grew up and lived until I was 40 in an area of New Mexico that is 3500. I was diagnoised with my first cataract at the ripe age of 41 and the second one at 44. The only thing that the doc could figure out why I had cataract at such an early age was because I was always outside and most of the time with no sunglasses.
When I moved to an area at sea level my body went crazy. Doctor told me it would take a year for my body to adjust to such a change in altitude. Changes were a period that never stopped, hair falling out and skin rashes. Has anyone else ever heard that?