All ophthalmic surgeons endeavor to obtain perfect vision after the removal of a cataract. On account of its prevalence, the loss of one of the most valued of the senses, and the restoration to vision by a bloodless and painless operation have concurred to render this operation an object of the highest attention to surgeons; and the progress of improvement in the operation has been commensurate with the advances made in surgery elsewhere in the economy. Unfortunately, with all our skill and knowledge, success does not always follow the removal of an opaque lens. The many contingencies incident to the healing of the wound, the distortion of the cornea, the subsequent change in the media caused by iritis, or a thickening of the posterior capsule—one or all of these factors play a very important rôle in the subsequent restoration to vision.
The opaque lens, with its capsule, obstructs the vision,