why do things look dark after you stare at something bright (like a lightbulb)?
In: Biology
There is a part of your eye called the Iris that is mechanically similar to your butthole (a sphincter, your body has a bunch of these types of muscles) but it’s purpose is reversed – your butthole (anal sphincter) keeps poop in your butt so you don’t randomly make a mess when there is poop ready to be released.
Whereas the iris prevents too much light from entering your eye and damaging or fatiguing your light and color sensors (rods and cones).
When you go from looking at something bright to something dark, it takes time for the iris to relax. As it relaxes, more light is allowed into your eyeballs which your rods and cones detects.
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