Rubbing your eyes

Rubbing your eyes

Rubbing your eyes increases the pressure within the eyeball and this pressure activates ganglion cells in the retina in the same way as light does. Your brain doesn’t know the difference and so interprets the activation as though you were seeing light from the world outside.

Previous Fact Next Fact
Categories: HumanbodyScience

Latest FactRepublic Video

32 Incredible Easter Eggs You Missed in Harry Potter Movies