CATARACT

is an opacity in the lens of the The public think it is on the surface of the eye, bs back it is Son deeply placed. Certain kinds of cataract occur in childhood, but the most common form is a disease of advanced life. The symptoms are gradual failing of vision, not at first so marked inadim light. The treatment is to wear dark gla es if these are found of service, and to wait until the cataract is ripe and then have it removed, afterwards the place of the lens in vision will be taken by a suitable spectacle gla . [s. 341]