A, blind eyes refers to the leaves that cover people's eyes, which belongs to the knowledge that light travels along a straight line and does not meet the meaning of the question;

B, shadows follow each other, indicating that shadows are inseparable from people and belong to the knowledge that light travels along a straight line, which does not meet the meaning of the question.

C, fishing for the moon in the water, in vain, means that the water surface is imaged like a mirror, which belongs to the knowledge of light reflection and conforms to the meaning of the question;

D, the frog at the bottom of the well sees very little, which is caused by the propagation of light along a straight line, which belongs to the knowledge of the propagation of light along a straight line and does not meet the meaning of the question;

So choose C.