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In presenting a new instrument to the American Medical Association it becomes necessary to show that such an invention is needed to fill a want. It seems to me that heretofore we have not had an implement for the convenient removal of the opaque capsule, or so-called secondary cataract. Often on account of its flaccidity or toughness, the ordinary needling of the capsule will not clear the pupil. We are frequently obliged to open the eye and remove the capsule with the forceps. The knife that I herewith present is about the size of the smallest discission needle. It is curved about 50 degrees on both the edge and the flat, with both edges and point sharp. Its action is somewhat corkscrew-like. By a rotary motion of this knife one can tear the capsule into fragments if necessary, or draw it to the corneal margin and extract it. I have
ERWIN AJ. A NEW KNIFE FOR SECONDARY CATARACT.. JAMA. 1896;XXVII(17):889. doi:10.1001/jama.1896.02430950009002a