If You Shine a Light into One Eye Both Pupils

question 20

Multiple Choice

If you shine a light into one eye both pupils will constrict. The best explanation for this is .

• A) information from one eye is directly and immediately transferred to the other eye to maintain alignment of the eyes
• B) a small portion of light always enters the other eye
• C) sensory input from the retinas of both eyes converges at the optic chiasm and information from each eye is delivered to both the left and right sides of the brain
• D) This, in fact, does not occur; information from both eyes is always separated.

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