Most important factor determining convergence of light rays on the retina is -: (A) Physical state of vitreous, (B) Diopter power of lens, (C) Curvature of cornea, (D) Length of eyeball
Answer is C. It has already been explained that most important refractive structure of the eye is cornea with a dioptric power of 44. The dioptric power of the cornea is dependent on two factors:-

i) Directly related to the refractive index of cornea,
ii) Inversely related to radius of curvature of cornea
Dioptric power of cornea = Refractive index of the cornea - Refractive index of air / Radius of curvature of the cornea