Figure 2: Cumulative survival in latanoprost non- responders and temporary responders (log-rank test). Dogs were divided into 3 groups of temporary responders based on the degree to which latanoprost lowered IOP from baseline (low, 10%-25%; medium, 25%-45%; high, >45%). Statistical significance was determined by the log-rank test; there were no significant differences between groups (P=0.23). The cumulative survival rate of the high group was higher than that of the other groups.