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August 1940


Author Affiliations

Norristown, P.a.

Arch Ophthalmol. 1940;24(2):372-373. doi:10.1001/archopht.1940.00870020164019

Operators conversant with the needling operation for secondary cataract or for iridocapsulotomy or iridotomy know that owing to the texture of the membranes involved or to their flexibility or mobility it is at times difficult to make the proper cut. The discission needle will slide over the margin of the capsule and push the capsule aside instead of cutting through it, as is necessary for a good opening. In order to secure a good aperture in the capsule, a triangular cut as advocated by Ziegler should be made.

The failings of the smooth-edged knife needle were responsible for the thought that an instrument with a serrated edge might overcome some of these shortcomings and give a "hold," so to speak, as the needle is drawn across the membrane. As a consequence, the discission needle herein described is offered.

A good knife needle should have a proper point for the puncture

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