I like Lash Booster from Physicians Formula. It works great. I had bad experience with lash extension few years ego and after that my lashes just stopped growing in the outer corner. I’ve tried castor oil but it didn’t worked. And few weeks ago I’ve tried this lash booster and I was very skeptical about it. But this thing helped me to grow my lashes and I’ve noticed it after a few days of using. By the way this booster has three shades: clear and black/brown so it is an eyeliner.