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This report of 450 cases of extraction of senile cataract is offered as a study of the comparative results obtained by the use of the combined, simple and intracapsular methods of operation and is in no way a brief for any one procedure. Each method of operation was used in 150 cases. The cases in which the combined method was used were all from private records; those in which the simple method was used were from private and clinical records, and those in which the intracapsular method was used were all from clinical records. The clinical records were from the ophthalmological department of the University of Michigan.
The cases selected for the simple operation were presumably uncomplicated; the corneas were large, the pupils were dilatable and the patients were well behaved. The cases selected for the intracapsular operation (performed according to the Knapp-Török method) were presumably uncomplicated ; the