Lateral Oblique Forehead Lines: Redefining Sleeping Lines and Treatment with Botulinum Toxin A

The study redefined lateral oblique forehead lines as resulting from the repeated contraction of the frontalis and orbicularis oculi muscles, rather than from sleeping positions. Two male subjects with these lines were treated with onabotulinum toxin A, showing positive esthetic results. This new understanding allowed for effective treatment of these lines by targeting muscular activity with onabotulinum toxin A.