system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does an optometrist create prescription lenses for an infant?
gpt
Lenses work both ways, so the Dr. can use a scope to look in the infant's eyes and try lenses to bring the back of the eye into focus. It won't be perfect, but if the infant has bad enough vision that they can tell the infant needs glasses, you'll be able to make a huge improvement anyway.