An<unk>  is a small rotary<unk>  powered by a battery. The<unk>  contains a small burr that is capable of penetrating an eye's corneal stroma to reach small foreign objects lodged in the cornea, such as rust rings.
Alger brush
Tao brush
Haidinger's brush
Earwax
Crusaid
Winpepi
Liftware
Tongue cleaner