Why do some people need glasses?

Answer: Eye shape affects focus

Eye shape affects focus ✓ — Correct! If your eyeball is too long, you're nearsighted. Too short, you're farsighted. Glasses bend light to compensate, focusing images correctly on your retina. The lens shape prescription corrects your specific eye shape!

Eyes wear out from use — Wrong. Eyes don't wear out like machines. Vision problems are usually about eye shape or lens flexibility.

Weak eye muscles — Wrong. Most vision problems aren't muscle weakness. They're about how the eye focuses light.