dInside the eye there is a lens that can change its fuedman thickness. VWhen we look at a distant object, the lens gets thinner. When an object is closer, the lens gets thicker.' In this way, the light coming through the lens always meets at the same point)at the back) of the eye.) 局り (Figure 2-1)A nearsighted person's eye cannot change he thickness of the lens very well. The light coming into he eye meets before it reaches the back of the eye. Figure 2-2) By using a concave lens, the light meets arther back in the eye. (Figure 2-3)