<prompt> Maximum refraction is done by:Anterior surface of lensPosterior surface of lensAnterior surface of corneaPosterior surface of cornea  <response>: Power of eye is contributed by surfaces where refraction of light occurs as it traverses from the external environment to the retina. These are: - Anterior surface of cornea max contribution - Posterior surface of cornea - Anterior surface of lens - Posterior surface of lens 