A drug used under the name Latisse to increase the length, thickness, and darkness of eyelashes. It is being studied as a way to increase the growth of eyelashes and eyebrows in patients given chemotherapy for cancer. Bimatoprost is also used under the name Lumigan to treat glaucoma (a build-up of fluid in the eye). It lowers pressure in the eye by increasing the flow of natural eye fluids out of the eye. It is a type of prostaglandin analog.