It depends on the person.
Your natural lashes shed, taking the extension with it.
Women with natural short lashes might see their extensions fall out quicker, not FAST, but quicker than women with longer natural lashes. Everyone natural lashes does fall out due to the natural state of Lash growth. So seeing a few lashes on the pillow after about a week and a half, is normal so don’t freak out!!
It depends on the adhesive.
The bond between the eyelash extension and natural lash lasts up to 6-8 weeks.
Some cheap salons may use lower quality adhesive that are heavier, or only hold the bond for 4-6 weeks.
It depends on the refill.
We recommend refill appointments to lash any new growth and to replace those lashes that has fallen off.
We recommend a refill within 3-4 weeks for volume lashes, and 2-3 weeks for classic lashes.
To sum it all up, most eyelash extension can last 4-8 week with proper refills.