Hello,
During my childhood, tears would come to my eyes each time it was too bright outside. No problems at night. So I wore dark glasses (1950 thru 1960) during daytime. Then it was discovered that I suffered astigmatism. So correct spectacles for the astigmatism but also very dark glasses. And when I say dark I do mean dark, almost black. No more headaches and no more crying in daylight. In the 80's when my eyesight started tumbling down I was issued stectacles with all the adequat corrections and I started diminishing the darkness of the glasses. I now still wear tinted glasses but only with a very faint tint, something like 25% (no where near what I used to wear).
I don't need sunglasses anymore since roughly 15 years.