2007-04-26 08:07:02 · 7 answers · asked by Abhishek 1 in Science & Mathematics ➔ Medicine
Your pupils get smaller as the iris (colored part of the eye) constricts when light levels are high. It's called "miosis," and it's not like "meiosis" which refers to cell division. This also occurs (but is unrelated to light) when you take narcotic pills (percocet, morphine) and when your body has a "parasympathetic" response (look it up). When your pupils dilate to let in more light in low lighting, it's called "mydriasis." This also occurs (again urelated to light) when you have a "sympathetic" response and due to some stimulant drugs (amphetamines, LSD).
2007-04-26 08:33:42 · answer #1 · answered by Matthew N 2 · 0⤊ 0⤋
I don't know if there's a word, but it's because your pupils get bigger in the dark so if you suddenly enter into light they need time to shrink back down, so for those few seconds a lot of light is going into your eyes so they close because it's too bright.
2007-04-26 15:21:18 · answer #2 · answered by Sunrayye 5 · 0⤊ 0⤋
The iris dilates or constricts depending on the light. In darker areas your iris will dilate, thereby allowing more light through your pupil to your retina. As you go into more light, your iris will constrict, making your pupil smaller to restrict the amount of light that hits the retina.
2007-04-26 15:28:30 · answer #3 · answered by Anonymous · 0⤊ 0⤋
A reflex.
2007-04-27 13:25:07 · answer #4 · answered by "Chreece" 3 · 0⤊ 0⤋
miosis
2007-04-26 15:36:51 · answer #5 · answered by sosta 1 · 0⤊ 0⤋
photosensitivity
2007-04-27 02:21:55 · answer #6 · answered by Anonymous · 0⤊ 0⤋
i think accomadation
2007-04-29 22:41:02 · answer #7 · answered by pecola princepessa 7 · 0⤊ 0⤋