If We Assume That the Central Corneal Power Is the Same

If we assume that the central corneal power is the same for each eye at normal axial lengths, for every 1 mm of axial length difference, how much difference in refractive error can be anticipated?

A) 3) 0 D
B) 2) 0 D
C) 1) 0 D
D) 0) 5 D