<prompt> Which of the following does not effect the refraction of eye -Removal of vitreousThickening of lensIncrease in depth of anterior chamberChange in axial length  <response>: Depth of anterior chamber has no role in refreactive system of eye. Refractive errors can be caused by: Eyeball length when the eyeball grows too long or too sho Problems with the shape of the cornea the clear outer layer of the eye Aging of the lens an inner pa of the eye that is normally clear and helps the eye focus Reference: AK khurana 7th edition 