A patient who is about to undergo cataract surgery has the following results during her 
pre-assessement.

• Axial length = 23.00 mm
• K1 = 42.00 DS
• K2 = 44.00 DS
• A-constant of the lens to be used = 118.0

a. Calculate the lens power needed to achieve emmetropia.

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.