FL-41 tint improves blink frequency, light sensitivity, and functional limitations in patients with benign essential blepharospasm.

Objective: The objective of these 2 studies was to assess the efficacy of FL-41-tinted lenses in the treatment of benign essential blepharospasm (BEB).

Design: A randomized crossover study and a randomized crossover case-control study.

Participants: The first study included 30 subjects with BEB.