Seeing Light Without Any Light

You can experience flashes of light even in total darkness. These visual sensations, called phosphenes, occur when your eyes or brain misinterpret physical pressure, electrical stimulation, or even sound as light.

Phosphenes are the reason you see swirling colors or patterns when you rub your closed eyes too hard. This happens because physical pressure triggers the retina to send electrical signals to your brain, which your mind interprets as light. While often harmless, these flashes can sometimes be linked to underlying medical conditions like optic nerve inflammation. It is a fascinating reminder that your reality is essentially a reconstruction created inside your own head.