Getting your lashes done is comparable to getting your nails done:

You get a full set, and if you want to keep and maintain them you get a fill every 2-3 weeks.

Like all the other hair on our bodies, our natural eyelashes are continuously growing. Your lashes will shed (with the extensions attached), and new hair will grow in its place. On average we lose 2-5 lashes per day but the rate of an individual's lash growth cycle is subjective.

During your fill appointment your lashes will be deep cleaned, damaged/outgrown lashes will be removed, and new extensions will be added.

Retention, how well your extensions hold up,  is highly contingent on how well you follow your aftercare instructions between your fill appointments.