Lexical Compendium

Wait... what is this? Sometimes I come across a word, phrase, idiom, quote, reference, bit of slang, person of interest, etc that either I don't know or I find amusing, interesting, etc. This is a collection of those items so that I can refer back to them in emails, texts, etc.

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rhodopsin

I learned, from sort of an unlikely source -- the National Park Service, the reason why "night vision" is reset after exposure to light.  That our pupils dilate  is probably obvious, but what I didn't know was that the body produces a protein called rhodopsin which, through a series of chemical reactions, gives our rods the ability to "see" in dim light.  The protein decays in bright light (though much slower in longer wavelengths, i.e. red light).  When depleted, it takes ~30m to regenerate.


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Tags: word, science, vision

Date Added: Unknown