@1939bear didn't see that ?
Vision and weed.
Well. I have always had really really really exceptional vision. And have got high regularly since I was 15.
Up until about 2years ago.
Right eye got a scratch and never fully recovered. 85% vision in that one I'd guess. Can't hardly tell unless I close my left.
But I will say barring vision. Chronic dry eye itch. Think it's a slight allergy to the weed actually. No proof. Would still smoke if confirmed. But I would say that my vision has held. Possibly better from blazing all day every day.