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The pupillary light reflex

The pupillary light reflex

In strong light the pupil contracts, while in low light it dilates.

01:11

Biology

Keywords

pupil, pupillary light reflex, reflex, unconditioned reflex, reflex arc, light perception, eye, light, sensory organ, vision, retina, iris, experiment, biology

On-screen labels

The pupillary light reflex, One of our unconditioned reflexes, is the pupillary light reflex., The pupil dilates or contracts, to regulate the amount of light, that enters the eye,, thus protecting the retina., In strong light the pupil contracts,, while in low light it dilates., In strong light the pupil contracts quickly.
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