What is the pupillary reflex?

A. Pupil dilation in response to a light shining into the eye
B. Pupil constriction in response to a light shining into the eye
C. Pupil movement toward a moving stimulus
D. None of the above


ANS: B
Rationale: The pupillary light reflex is pupil constriction in response to a light shining into the client's eye. A complete interruption of the optic nerve results in ipsilateral blindness and a loss of the pupillary light reflex. Loss of the pupillary light reflex may also occur with a lesion of CN III because the oculomotor nerve is the efferent limb of the reflex.

Health & Biomechanics

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What will be an ideal response?

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