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Pupillary reflex
/pjˈuːpɪləɹi ɹˈiːflɛks/
/pjˈuːpɪlɚɹi ɹˈiːflɛks/Pupillary reflex
01
reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller
Example
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