A fish's eye is well-suited to seeing under water, but what can you say about his vision if he is taken out of water?
A) He would be nearsighted.
B) His vision would be limited to a cone of half-angle of about 49°.
C) He would suffer from astigmatism.
D) He would be farsighted.
E) His acuity (sharpness of vision) would be greater.

Question

Quizplus · Accepted Answer

Fish eyes are adapted to the refractive index of water, so when taken out of water, the refractive index changes, causing the fish to become nearsighted.

A Fish's Eye Is Well-Suited to Seeing Under Water, but What