Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

A visual "copy" of an object that is formed by reflected or refracted light is called image.
A visual "copy" of an object that is formed by reflected or refracted light is called what?

A concave lens is thicker at the edges than it is in the middle.
What type of lens is thicker at the edges than it is in the middle?

Comprised mainly of collagen and associated with long bones and the skull, hyaline is the most widespread type of collagen.
Comprised mainly of collagen and associated with long bones and the skull, hyaline is the most widespread type of what?