how do non drug induced Visual Hallucinations work ? what happens in the brain that makes the eyes see something that isn’t there?

Question

how do non drug induced Visual Hallucinations work ? what happens in the brain that makes the eyes see something that isn’t there?

In: 598

Answer 1

Our eyes filter things in a way that’s useful for us to function, not necessarily a representation of what’s “really” there. Objects could be fuzzy, or less so, or whathaveyou.

You could easily have a halllucination by your eyes finding a pattern in something that is false, then the brain reinforcing that idea so you can quickly interact with it.