Nature, in her infinite wisdom, did us the favor of having our vision deteriorate at the same time that our skin becomes wrinkled. We had to go and screw it up by inventing eyeglasses.
But just after thinking this, I noticed I was having trouble seeing a tiger at a distance yesterday. Which could have been a problem if it were happening somewhere other than at the zoo. I guess the survival value of eyeglasses outweighs their cost to vanity.