Why do you see patterns when you press on your eyelids?
In: Biology
Pushing on your eyes transmits stress to your retina. The cells in your retina respond not only to light, but also to changes in pressure. So your eye/brain interprets this as light, and your brain tries to visualize it as something real.
Doing this is NOT a good idea. Putting undue pressure on your retina can cause it to tear and even detach. In a worst-case scenario, you could become permanently blind.
*Source*: I have retina issues and have spoken to multiple retina specialists.
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