keratoidea

[KERATOSA.] kěr-a-tōme, s. [Gr. keras (gen it. keratos )=a horn, and tome a cutting; temno =to cut.] Surg.: A knife used in the operation for artificial pupil and cataract. Also called iridectome, or artificial-pupil knife. is spear-pointed, double edged, and may be straight or angular. It is used making incision through the cornea into the anterior chamber, and by slight movements of its cutting edges, upward and downward, the wound is made of proper dimensions, after which the operation is completed with other instruments.