pupillary reflex

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Related to Pupil constriction: Pupil dilation

pupillary reflex

[′pyü·pə‚ler·ē ′rē‚fleks]
(physiology)
Contraction of the pupil in response to stimulation of the retina by light. Also known as Whytt's reflex.
Contraction of the pupil on accommodation for close vision, and dilation of the pupil on accommodation for distant vision.
Contraction of the pupil on attempted closure of the eye. Also known as Westphal-Pilcz reflex; Westphal's pupillary reflex.
References in periodicals archive ?
The unit also offers low-flash intensity minimizing pupil constriction, while shortening the time required for taking multiple pictures.
The low flash intensity of the CR-2 Digital Non-Mydriatic Retinal Camera minimizes pupil constriction thereby shortening the time required for taking multiple pictures such as binocular, stereo photography.
The CR-2 Digital Non-Mydriatic Retinal Camera's low flash intensity minimizes pupil constriction thereby shortening the time required for taking multiple pictures such as binocular, stereo photography.