Which of the following is true of the fovea?
A) It contains only rods.
B) It contains the highest concentration of cones.
C) It is located around the periphery of the retina.
D) It works best in low light conditions.
Answer: B
Rationale: The fovea is the central region of the retina that contains the highest concentration of cones; this is why objects we center our vision upon are the clearest and most colorful relative to objects in the periphery. Because cones do not work well in low light conditions, the fovea does not function efficiently in low light.
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