A certain childs near point is 10.0 cm; her far point (with eyes relaxed) is 125 cm.

Question:

A certain child’s near point is 10.0 cm; her far point (with eyes relaxed) is 125 cm. Each eye lens is 2.00 cm from the retina.
(a) Between what limits, measured in diopters, does the power of this lens–cornea combination vary?
(b) Calculate the power of the eyeglass lens the child should use for relaxed distance vision. Is the lens converging or diverging?