1. Eyelash extensions are NOT the same as temporary lashes.
Typically, semi-permanent lashes are applied by a technician who hand-glues the extensions on top of your natural lashes, says Courtney Akai, a New York City-based extensions expert with more than 12 years of experience. With proper care (more on that later), they can last for six to eight weeks until they naturally fall out like your lashes usually do.
2. Eyelash techniques are constantly evolving.
Whereas the classic, most widely used technique involves applying a single lash extension over your natural lash, the Russian Volume technique (also referred to as the Volume Technique or 3D lashing) is a newer trend where the technician places up to eight ultra-fine extensions onto each natural eyelash for a fluffy, thick, fanned-out effect, says Andra Ciulei, master lash specialist at the Courtney Akai Lash Salon.
3. Extensions aren't a one-size-fits-all situation.
So you want Kim Kardashian-level lashes? Great—but that doesn't mean your eyes can handle them. "The type of lashes you can get all depends on the length and strength of your natural lashes," says Ciulei. "Wearing lashes that are too long or too thick for your lashes can actually cause damage in the long run, so you need to make your sure your extensions aren't too much longer or thicker than your natural lashes."