Why can’t eyesight fix itself? Bones can mend, blood vessels can repair after a bruise…what’s so special about lenses that they can only get worse?

Question

How is it possible to have bad eyesight at 21 for example, if the body is at one of its most effective years, health wise? How can the lens become out of focus so fast?

Edit: Hoooooly moly that’s a lot of stuff after I went to sleep. Much thanks y’all for the great answers.

In: 4262

Answer 1

Lenses are like eye teeth. You have to look after them because they get worse over time no matter what you do. With teeth you avoid sugar and brush etc. With lenses they degrade with exposure to UV and your eye muscles generally get weaker as you get older too. Wear sun glasses kids!