A lash lift is a perm that curls your natural eyelashes, giving the appearance of longer lashes.  By lifting the lashes at the base.  It is considered a low-maintence option to enhance your natural lashes.  It can last between 5-7 weeks, but depends on your lash growth cycle.  Tint is a semi-permanent dye applied to your natural eyelashes to darken their color so that you don't have to use mascara.