noun
Beauty treatment where synthetic lashes are attached to natural lashes.
まつげエクステンションを付けて、目元をぱっちり見せたい。
I want to get eyelash extensions to make my eyes look bigger.
False eyelashes that are applied as a strip, removed daily, while まつげエクステンション are individual extensions that last several weeks.
From まつげ (eyelash) + エクステンション (extension), a loanword from English.