go get your eyes checked - Divisions by zero

You would not have ruined your eyes in the first place back then because no evil tablets and other artificial garbage bad for the eyes
We have discovered nearsightedness is caused by a lack of sunshine during childhood. The amount of bright light you’re exposed to determines when your eyeballs stop growing/adjusting and if you don’t get enough you end up near-sighted.
That’s a factor sometimes, but plenty of people are just genetically nearsighted.