TESTED: Ophthalmologist and Dermatologist Tested | Helping to enhance short, thinning, brittle lashes | Using a single stroke on your eyelid just above your upper lash line (like a liquid eyeliner) | Easy to Use--Simply place a thin line along the base of your upper and lower lash line once a day at nighttime. Apply only at the root area of eyelashes and as though applying eyeliner and onto clean eyebrows. | Insist using over 60 days is recommended. Any unsatisfied, please feel free to contact us for solution .