The direction of pull of the muscles forms a 23Â° angle relative to the visual axis in the primary position, giving rise to secondary and tertiary functions. The secondary action of vertical rectus muscles is torsion. The superior rectus is an incyclotorter, and the inferior rectus is an excyclotorter.
-Marcia. Dear Marcia, Eyelash growth serums generally contain either a prostaglandin derivative, like prescription Latisse, or over-the-counter Revitalash; peptides, like Jan Marini Growth Serum; or vitamins, like Peter Thomas Roth Lashes to Die For.
The 10 Best Eyelash Growth Serums On the Market. Courtesy. December 25, 2016 @ 3:15 PM. Achieving longer, fuller lashes without extensions or falsies may seem too goo to be true, but if you want lengthier lashes that are the real deal, it is possible with a lash growth serums.