A lash lift is like a perm for your eyelashes. Unlike a lash extension, a lash lift simply alters the shape and color of your natural lashes. 
The treatment involves “boosting and lifting each individual lash, before tinting them for thicker, darker, longer looking lashes
 
What is an eyelash tint? Think of eyelash tinting like getting your roots touched up. The dye will intensify your natural lashes by darkening them and adding definition to the eye. The dye itself is similar to what you use on your hair, except it's specifically developed to be safe around the eye area.