please help me with this dot point (1 Viewer)

[04er]

"compare the change in the refractive power of the lens from rest to maximum accomodation"

any suggestions?

 

[Halo]

Perhaps you can measure and compare the focal lengths produced by each lens (each having a different "fatness", by which I mean the curvature in which the incident light enters is more angled the fatter it is) after a parallel beam of light is shone across it. Each of the different lens would represent a different accomodation level. The smaller the focal length produced, the greater the refractive power of the lens.