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February 1950


Arch Ophthalmol. 1950;43(2):370. doi:10.1001/archopht.1950.00910010377013

ASCLEROTOMY knife is here presented.1 The need for this knife is based on the fact that the scleral incision for iridectomy ab externo, iridencleisis, cyclodialysis, scleral resection or incision for removal of a foreign body through the posterior route is a delicate and careful procedure. If the incision is done too rapidly and too deeply, the uveal tract may be incised and vitreous may prolapse.

The blade itself forms an obtuse angle of approximately 135 degrees with the handle. The widest portion near the handle is 1.25 mm.; it then narrows to a sharp point. The entire blade is about 1.2 cm. in length. The lower surface is sharp and bevels upward. The upper surface has a cutting edge which extends from the point for a distance of 3 mm.

This knife has the following advantages: 1. Because of its angle, it facilitates the incision and makes it easier

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