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.
Vitamin H, also known as Biotin, is included in the family of B complex vitamins. B complex vitamins are often found in hair products because of its ability to strengthen hair. Vitamin H keeps the nails and the hair on your body healthy. It helps make lashes thicker and also lengthens lashes. This is because hair is made of keratin which is a cellular protein. Vitamin H also aids in absorbing amino acids and carbohydrates which lead to stronger and healthier lashes.