The main ingredient in Careprost USA is bimatoprost ophthalmic (0.03%), which lowers the pressure inside the eye. The solution is very effective at lowering IOP due to glaucoma. Careprost may be used to treat hypotrichosis, a disorder that results in falling eyelashes, in addition to glaucoma. When treating hypotrichosis, the eye drops aid in growing longer, thicker, and darker lashes.