Abstract
Through a double oversight on the part of the author, the data on the t ratios for pressure and facility changes in response to increases in drug concentration (Tables III and V in the article, "Dose-effect relationships as an aid in the evaluation of ocular hypotensive drugs," by Dr. Peter C. Kronfeld, in the June, 1964, issue of this JOURNAL) were presented in an ambiguous if not misleading form. This error is corrected, without any change in the data, in the new Tables III and V shown below.