<prompt> A 25-year-old student with 2020 vision looks up from his book to view his girlfriend sitting on the other side of the room. Which of the following is most likely to occur when the student changes his view from his book to his girlfriend?Thicker lens, contraction of ciliary muscleThicker lens, relaxation of ciliary muscleThinner lens, contraction of ciliary muscleThinner lens, relaxation of ciliary muscle  <response>: Light rays from distant objects do not require as much refraction bending as do light rays from objects close at hand. Therefore, a thinner lens with less curvature is required for viewing distant objects. The process of accommodation adjusts the thickness of the lens for near and far vision by contracting or relaxing the ciliary muscle that surrounds the lens of the eye; contraction of the ciliary muscle thickens the lens, and relaxation causes the lens to become thinner. 