Cataract Extraction by Expression.

BEFORE the introduction of enzymatic zonulysis by Joaquin Barraquer (1958), the normal procedure of senile lens extraction was either by intraor extra-capsular extraction, or, more recently, by the use of the erisophake. This latter operation can be done with much greater facility by the use of the enzyme, as has been demonstrated by Barraquer (1958), Cogan (1958), and Cogan, Symons, and Gibbs (1959). The author has found that, with the use of this enzyme, the lens can be expressed intra-capsularly, in the great majority of cases, by a simple manoeuvre, to be described later. The advantages are simplicity of surgery and the absence both of the striate keratitis which appears to be a complication of erisophake extraction and of the tumbling technique of forceps extraction.