Yknow when you rub your eyes way too hard and you start seeing stars or little sparkly things? Yea. Why exactly does that happen?
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You are putting physical stress on your retinas, through the vitreous (jelly) of your eyeball. This causes some of the retinal cells to fire, which your brain interprets as light.
DO NOT DO THIS. Putting stress on your retina can cause bad things to happen. Sometimes very very bad.
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