When you shine a light into one pupil, what is the normal reaction of the opposite pupil?

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Multiple Choice

When you shine a light into one pupil, what is the normal reaction of the opposite pupil?

Explanation:
Shining light in one eye triggers the pupillary light reflex, which causes both pupils to constrict. The signal travels from the retina to the brain and then back out through the oculomotor nerve to the iris sphincter muscles. The eye that receives the light constricts directly, and the opposite eye constricts as well—the consensual response. So the normal reaction of the opposite pupil is to become smaller due to this bilateral constriction.

Shining light in one eye triggers the pupillary light reflex, which causes both pupils to constrict. The signal travels from the retina to the brain and then back out through the oculomotor nerve to the iris sphincter muscles. The eye that receives the light constricts directly, and the opposite eye constricts as well—the consensual response. So the normal reaction of the opposite pupil is to become smaller due to this bilateral constriction.

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