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To the Editor.
—In the Archives of Ophthalmology, vol 87, February 1972, there is an editorial by Dr. D. G. Durham entitled "A Hazard of Cryoextraction" (pp 117-118) and an article, "Electrical Hazards of Cryoextraction" (pp 225-227) by Drs. J. D. Wirtschafter and K. K. Sohmer.The Dynatech Cryomedical Company is the exclusive manufacturer of the Amoils cryoconsole and cryopencils in the United States. The Amoils' cataract pencil referred to in Drs. Wirtschafter's and Sohmer's article was manufactured in 1967, and the failure reportedly occurred in October of 1970. Since we received the equipment for examination on June 3, 1970, we must assume that there is a typesetting error in the article and the date of the failure was October 1969.As pointed out in the article, the pencil had been damaged through mistreatment. Externally there were score marks on the metal probe barrel and the tip was misaligned. Internal
Crandell WH. CRYOEXTRACTION. Arch Ophthalmol. 1972;88(1):86-87. doi:10.1001/archopht.1972.01000030088022