A MODIFICATION OF THE ERISOPHAKE WITH DISCUSSION OF TECHNIQUE

During the last few decades, phacoerisis has achieved increasing popularity as a method of delivering the cataractous lens from the eye. The early work of Stoewer, 1 Hulen, 2 and Barraquer 3,4 laid a firm foundation for the many modifications of the suction cup and apparatus that were to come. An excellent suction cup was constructed by Dimitry 5 in 1939, after considerable inquiry into the physical aspects of vacuum production in phacoerisis. Floyd and Grant, 6 in 1946, used the Dimitry tip in conjunction with a small spring-operated syringe. The vacuum could be established easily and accurately, and this device was a great improvement over existing instruments. Bell, 7 in 1948, introduced a new tip attached to a rubber bulb which provided fingertip control and comparatively easy manipulation. The indefinite vacuum level and excessive flexibility exhibited by this instrument have proved a disadvantage in some instances. Thomas 8 considered