ELI5; When you close your eyes at night you see all these colours, and when you press your eyes they become more and more vilbrant the harder you push. What are those and where do they come from?
In: Biology
I was never sure if this was just me or not. Happy to know.
I can also get a similar effect by closing my eyes harder. If that makes sense.
…. i dont usually see different colours when I close my eyes when I sleep… should I be concerned
Within your eye you have cells that are light-sensitive that send signals to your brain in order to create a picture. These cells are also sensitive to other stimuli (pressure), but do not know the differences between stimuli.
When you rub your eye, you activate these cells and they send information to your brain thinking that they have received light. Your brain interprets the data as if it were light, and it is because of this that you might see stars, auras, and shapes even though your eyes are closed.
These are called phosphenes.
Your eyes are sensors that receive light and send that signal to the brain to be interpreted as what you see. Applying pressure as you describe activates the sensors in your eyes and sends signals to your brain, and what you see is your brains interpretation of the signals caused by the applied pressure.
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