<prompt> Most important factor determining convergence of light rays on the retina is -Physical state of vitreousDiopter power of lensCurvature of corneaLength of eyeball  <response>: 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 corneaDioptric power of cornea Refractive index of the cornea - Refractive index of air Radius of curvature of the cornea 