An evaluation of cataract cryoextraction

A small cryoextractor has been used in 1,000 cataract extractions, and the results have been compared to results in a control series of 1,000 extractions by other techniques. Regardless of the previous experience of the surgeon or the maturity of the lens, the incidence of rupture of the capsule was reduced when cryoextraction was used. The incidence of rupture was reduced by 8% in immature, 40% in mature, and 43% in hypermature cataracts. The incidence of loss of vitreous was the same in the cryoextraction and control series. The cryoextractor adhered to the iris in 7% of cases, to a suture in 2%, to the cornea in 1.5%, and to vitreous in 0.3%. This unwanted sticking to iris, suture, and cornea did not appear to represent a significant hazard to the eye. In the majority of the cases, the surgeon concluded, after employing cryoextraction, that this was the best of the techniques from which he might have chosen.