Latisse is a prescription medication used to enhance eyelash growth. It contains the active ingredient bimatoprost, which helps to increase the length, thickness, and darkness of eyelashes. Originally developed to treat glaucoma, it was later discovered that it also promotes eyelash growth as a side effect. To use Latisse, patients apply the solution to the base of the upper eyelashes once daily using a sterile applicator. Results typically become noticeable after about 4 weeks, with full effects seen after 16 weeks. If treatment is stopped, eyelashes will gradually return to their original appearance.