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.
What Eyelash Extensions Are. Eyelash extensions are individual artificial lashes applied on a hair-by-hair basis to each eyelash using glue. They are different from false eyelashes because they can last several weeks, depending on how well they are cared for.epending on whether a full set or a partial set of extensions is used, the entire procedure takes around 1 to 2 hours. To apply the extensions, waterproof adhesive is used. Black waterproof adhesive is commonly used. This is because it looks like mascara when applied. Use non-stick tape to hold down bottom lashes.