2019-12-12:
Eye Beams

The emission theory of vision states that visual perception is caused by "eye beams" emitted by the eyes. Early Greek philosophers like Plato believed in that theory, and argued that cats' eye beams must be stronger, so they can see in the dark.

A 2002 study found that over 50% of the adults in the studied group thought that emission from the eye was part of how humans see.