What is the most likely problem?
You are conducting a pupillary examination on a 34-year-old man. You note that both pupils dilate slightly. Both are noted to constrict briskly when the light is placed on the right eye.
A) Optic nerve damage on the right
B) Optic nerve damage on the left
C) Efferent nerve damage on the right
D) Efferent nerve damage on the left
B) Optic nerve damage on the left
Because both pupils can constrict, efferent nerve damage is unlikely. When the light is placed on the left eye, neither a direct nor a consensual response is seen. This indicates that the left eye is not perceiving incoming light.
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