How do we know how animals see?

Question

For example how do we know that they see ultraviolet, gamma rays or infrared? Or if they see colors or how sharp is their sight?

In: Biology

Answer 1

“We can find out whether an animal can see light of a particular wavelength by testing whether that light will travel through the lens of its eye. The lenses of healthy humans block ultraviolet light, so we cannot see it. But for other species, seeing ultraviolet can make it easier to see in dim light.” – http://www.bbc.co.uk/earth/story/20151019-how-do-we-know-what-animals-can-see-hear-and-smell