Cryoprehensile cataract extraction is a new technique rapidly approaching perfection since Krwawicz1 in attempting to eliminate the factor of "unreliable methods of grasping the capsule" introduced his methanol-carbon dioxide ice cooled extractor in 1961. His instrument had three deficiencies: too short a freezing period, poor insulation about the tip, and crude technique for detaching tissues which accidentally became adherent to the extractor. However, the efficacy of the method was firmly established by him2 in 1963 when he reported the results on over 600 cases of all types of cataracts with less than 3% of ruptures of the capsule despite the fact that over 400 cases were of intumescent cataract. He noted the probability of a too-narrow corneoscleral section as a major cause of capsule rupture as well as suggesting capsular shrinkage produced by the freezing as an etiological factor.
Kelman and Cooper3 in 1963, using a liquid
MATTIS RD, BRADY HR, SUGANA T. Disposable Gryophake—Clinical Evaluation. Arch Ophthalmol. 1965;74(6):787–791. doi:10.1001/archopht.1965.00970040789009
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