Tuesday, July 14, 2020


We just learned about the Astigmatism.

Another kind of refractive error is Presbyopia.

This is something that usually happens to older people, when the lens of the eye gets harder.
When that happens the eye focuses light behind the retina instead of right on it.

If someone has this presbyopia, they usually can't read small printed words, and a lot of times they have to hold things away from them to see them better.

(from: wikipedia - presbyopia)

Kid Facts - Blast from the past: Parotid Gland