Cataract Surgery: types and frequencies of complications.

A total of 4,300 cataract extractions were evaluated with respect to operative complications and their effects on postoperative visual function. Severe vision-threatening complications such as vitreous or expulsive hemorrhage occurred in 6 of the 4,300 eyes; 726 eyes followed up over 1--3 years showed late complications in 0.44%--1.77%. The relevance of the date prior to surgery is discussed.