system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Most important factor determining convergence of light rays on the retina is -
assistant
The correct answer is  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