Pupillary Light Reflex:
In this reflex, pupil contracts when light is directed towards it. Contraction of pupil is called "miosis or myosis".
Pupillary light reflex is used to assess the brain stem function. Abnormal pupillary light reflex can be found in optic nerve injury, oculomotor nerve damage, brain stem lesions, such as tumors, and medications like barbiturates.
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