<prompt> Maximum contribution to the refractive power of the eye is by:Anterior surface of corneaAnterior surface of lensPosterior surface of corneaPosterior surface of lens  <response>: Ans. a Anterior surface of corneaRef: Cornea by Mannis p. 145On average anterior cornea has refractive power of 48D of convergence and posterior cornea -5D of divergence. 