A patient who is about to undergo cataract surgery has the
following results during her
a. Calculate the lens power needed to achieve emmetropia.
Axial length = 23.00 mm
K1 = 42.00 DS
K2 = 44.00 DS
A-constant of the lens to be used = 118.0
b. During the operation, the patient has a large ruptured posterior
capsule and you
decide to fit the lens in the sulcus. Would you
use a lens (same A-constant) with
a higher or lower power compared with a.