Here's why:
* Lifespan: Eyelashes have a lifespan of about 4 to 8 weeks, while head hair typically lasts 2 to 7 years.
* Growth Cycle: Both hair and eyelashes go through growth cycles (anagen, catagen, telogen), but the cycle is much shorter for eyelashes.
* Shedding: Eyelashes shed naturally as part of their growth cycle.
While a single eyelash may not last as long as a single head hair, the constant shedding and regrowth of eyelashes means you'll always have some present.