Showerthoughts

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A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. A showerthought should offer a unique perspective on an ordinary part of life.

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We tend to describe the pupil as though it's its own actual separate part of the eye. It's almost strange to think about the fact that in reality it's just a hole in the Iris and not a "thing" at all. (lemmy.ca)

submitted 1 day ago* (last edited 1 day ago) by [email protected] to c/showerthoughts

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For example, why do we say "Your pupils are dilated". They aren't. It's the iris aperture that is dilated.

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[–] [email protected] 2 points 12 hours ago

Well yes, but also no.

The term pupil is used to describe an area that exists inside a three dimensional space, the eye, and while that space may not have anything that reflects light, it_does_contain something. The surface of the eye, known as the lens, and the liquid or 'jelly' that is contained inside the eye. So that area that is light reflective material would include the whites and the iris, but the inside of the eye is not just empty space. If it was, your eye would collapse like an uninflated beach ball, and you wouldn't see very much at all. Arguably the term pupil is used to refer to the non-reflective area of the eye bordered by the iris and containing the lens.