A great, lesser-known trick to make your eyelashes look fuller is to tightline them. This technique is practically invisible and it also really helps to define your eyes. Take a black powder (I use Risque by Younique -- a mineral-based pigment I'm madly in love with), and use an eyeliner brush to apply the eyeliner underneath your top eyelashes, not above them. That area is called the waterline and because it tends to be naturally wet, you will need to really work the pigment into the skin. See how it makes the model’s eyelashes look really dense and full in the after shot? It's like fake eyelashes... without the fake eyelashes.