Total dioptric power of the crystalline lens inside the eye is:: (A) 41 D, (B) 18 D, (C) 59 D, (D) 72 D
Answer is B. Diopteric power of the crystalline lens is +18 D. Total refractive power of the entire eye is +59 D; most of the refraction occurs at the anterior surface of the cornea (41 D).