Effect of Bimatoprost (Lumigan) in Gel Suspension Applied to the Eyelashes on Eyelash Growth

Objective: To determine if Lumigan (bimatoprost) causes increased lash length when used in gel suspension applied to the base of the eyelashes. Methods: Subjects recruited from the Bascom Palmer Eye Institute were screened and those who met inclusion criteria were enrolled. Each participant received two vials of gel suspension, which contained bimatoprost and normal saline, respectively, each mixed 1:1 with GonakTM gel and labeled "right eye" and "left eye" according to randomization. The suspension was applied to the eyelashes every evening on the designated eye for 6 weeks. Lash length was measured with a caliper at enrollment, at weekly intervals during the study and at 1 and 3 months after study completion. Visual acuity, ocular symptoms, intraocular pressure and photographs were documented at these same intervals. Results: The average eyelash growth in the Lumigan group was 2.01mm (vs. control average of 1.13mm) which was a statistically significant difference (p=0.009). The average intraocular pressure decreased equally in both groups (2.14 mmHg). No change in visual acuity or iris discoloration was noted in any of the subjects. Discussion: Our data showed an increase in eyelash length with use of Lumigan in gel suspension, suggesting that it may have eyelash lengthening properties.