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For optimal results, when should an extensionist perform a fill for a client?

  1. After a week

  2. After two weeks

  3. After three weeks

  4. After a month

The correct answer is: After three weeks

For optimal results, performing a fill after three weeks aligns with the typical lash growth cycle and ensures that the extensions remain looking full and maintained. Eyelash extensions naturally shed along with the natural lashes, which occurs approximately every 30 to 60 days. By the three-week mark, clients usually start to notice gaps as some of the natural lashes have fallen out, making this an ideal time for a fill to refresh their look and replace any missing extensions. Scheduling fills at this interval also allows the client to maintain the integrity of their natural lashes, as waiting too long can lead to unevenness and an unkempt appearance. It balances the longevity of the extensions with the need for aesthetic upkeep. Additionally, fills done at this frequency can help in managing the overall health of the natural lashes by preventing overloading them with too many extensions at once, which might occur if fills were done less frequently.