im 47. always worn sunglasses flying, driving, just when out and about and the best one I could get my hands on at that. Been told by optician I have very mild cataracts in each eye. Don't do enough flying for that to be the cause, guess its just one of those things. its a bugger. not so long ago I was 4 in each eye, now I am 6 and can really tell the difference!!
