Careprost Eye Drop is a medication that adults with glaucoma and high intraocular pressure can use to reduce eye pressure. Excessive eye pressure can impair vision and perhaps result in blindness. It functions by making it easier for fluid to enter the bloodstream from the inside of the eye. It can be applied to treat ocular hypertension or open-angle glaucoma. The mechanism of action of bimatoprost is to increase the volume of fluid that exits the eye.