What does spectacles?

mine never have!!

A spectacle lens is a lens worn in front of the eye, mainly used to correct myopia, hyperopia, astigmatism.

Hi, Nobody knows exactly when spectacles were intended. It is very clear that they were invented between 1280 and 1300 A.D.

Why not? Mathematicians have done the nightclub comedy circuit, so why couldn't astronomers be in a spectacle? Oh, you mean can astronomers WEAR spectacles? Of course. People rarely sit at their...