Exploring What You See When Your Eyes Are Closed: Phosphenes & Hypnagogia

When your eyes are closed, you can see:

* Darkness: This is the absence of light, and it is what you see when your eyes are closed.

* Phosphenes: These are flashes of light that you can see when your eyes are closed. They are caused by the electrical activity in your brain.

* Hypnagogic imagery: These are dream-like images that you can see when you are falling asleep or waking up. They are often vivid and colourful, and they can be anything from people and places to animals and objects.

* Closed-eye hallucinations: These are hallucinations that you can see when your eyes are closed. They are different from hypnagogic imagery in that they are not dream-like, and they can be very real and disturbing.