Here’s a trick makeup artists use for getting at those bottom lashes (and the tiny ones in the corners) without making a mess. Take a thin, synthetic eyeliner brush, shaped flat and square, and load it up with your favourite smudge-proof mascara. Paint along your bottom lashes using up and down and side-to-side strokes.
Using the brush allows you to get all the way to the roots and gives you a very natural look. Also use it on top lashes to darken the roots without destroying your eyeshadow.