Careprost Eyelash Serum is a medicine used for growing eyelashes. The active ingredient, Bimatoprost Ophthalmic, does this by increasing the density, thickness, and length of the eyelashes. Bimatoprost Ophthalmic also increases amount of fluid in the eye and is actually officially used to treat glaucoma. For a glaucoma treatment, the medication needs to be dropped onto the eye, as opposed to the eye lid only when used for eyelash treatment. Put one drop of Careprost (Bimatoprost Ophthalmic) on a liquid eyeliner cartridge. Draw a line along the upper eyelid, and then remove the excess liquid. Repeat this procedure with the other eye. Do not apply Careprost (Bimatoprost Ophthalmic) to the bottom eyelid. Apply Careprost (Bimatoprost Ophthalmic) once a day. Results can normally be seen after two months of use, although it usually takes three to four months to achieve the desired effects.