An eyelash enhancement is a tattoo placed right within the lash line. It creates the illusion of fuller and longer lashes. While looking very sharp and rather thick when first done, the eyelash enhancement heals into a subtle, very natural look.
An eyeliner is a tattoo within and above the lash line. While creating the illusion of fuller and longer lashes the eyeliner will also give a more made-up, therefore more of a make-up effect.