This is a double-blind, randomized, parallel-group, controlled, dose-ranging, multi-center study to evaluate the safety and efficacy of RT001 compared to placebo applied as a single, bilateral application in at least 180 subjects with moderate to severe LCLs. Subjects will be randomized within each site to 1 of 3 treatment groups in a 1:1:1 ratio. The safety and efficacy of two different doses of RT001, compared to placebo, will be evaluated.