The lens adjusts the focus of the eye, making it possible to see things clearly irrespective of their distance from the eye. The lens is transparent because it has a very low water content and because of its highly-organized structure. The lens is suspended from the ciliary body by the zonules. With age, the lens grows and becomes harder so that it is more difficult to focus on near objects without reading glasses (i.e., 'presbyopia'). When the lens degenerates or is damaged, it becomes cloudy forming 'cataract'.