system
Given the following post, respond as if you're commenting on Reddit:
human
[Eli5] How do they make eye glasses for infants?
gpt
At just a few weeks old, a baby with healthy eyes will track you, moving their head and eyes to follow you. If your baby isn't doing this significantly later than most babies exhibit this behavior, they may have eye problems. The optometrist may then use a machine to get more information about the eye and determine what kind of prescription is needed. It would likely have to be updated fairly frequently as the baby's eyes develop, but it could lead to allowing a baby born with moderate vision problems to see more clearly.