How long do semi-permanent eyelash extension last?
A natural eyelash falls off every 60 to 90 days on average due to the natural growth cycle and is naturally replaced with the growth of a new eyelash. At any given moment, each of your natural eyelashes is at a different stage of its life cycle. A touch up is needed to replenish the lashes that have completed their life cycle. Since everyone’s eyelash cycle growth is different, we recommend getting a touch-up every two, three or four weeks.