A 23-year-old woman is suffering from severe visual neuritis. She has had relapsing-remitting multiple sclerosis in the past. Her brain MRI indicates a demyelination region affecting the right optic nerve. Which of the following is most likely to be discovered after a thorough examination of both eyes?

Question

Quizplus · Accepted Answer

Eductional Objective: The afferent limb of the pupillary light reflex pathway is carried by the optic nerve, which activates the efferent limb bilaterally and induces both direct and consensual pupillary constriction. Unilateral optic nerve lesions (for example, demyelination caused by optic neuritis) can cause bilateral pupillary constriction when light enters the eye ipsilateral to the lesion. Pupilary constriction happens normally in both eyes when light reaches the contralateral eye.

A 23-Year-Old Woman Is Suffering from Severe Visual Neuritis