Lens

A lens

A lens is a piece of transparent material that changes the directions of light coming in.

Lenses are in our eyes, and lenses are in magnifying glasses and VR headsets. VR headsets use two lenses, one for each eye.

There are different types of lenses, including fresnel lenses and pancake lenses.

Lenses can be bunched together to form a lens array, which can be used for light field imagery.