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pupillary reflex |
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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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Photo: Nerve pathway for pupil constriction in rats. In order to be effective, conventional pilocarpine must be administered up to four times daily, with the potential for vision-impairing pupil constriction and other side effects to occur with each dose. With each dose, vision-impairing pupil constriction and other adverse effects may occur and can persist for up to several hours. |
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