Most important factor determining convergence of light rays on the retina is :: (A) Length of the eyeball, (B) Refractive power of the lens, (C) Curvature of the cornea, (D) Physical state of the vitreous
Answer is C. Ans. (c) Curvature of the corneaRef: Optics of the human eye, p. 15-20Cornea is the most important refracting medium responsible for convergence of light rays to the retina because of its curvature and difference in refractive index from air to cornea.