Methods Perfluorocarbon liquids was used in vitrectomy to facilitate the extraction of nonmagnetic intraocular foreign body on 29 cases (33eyes).

• 方法对29例（33眼）非磁性眼内异物行玻璃体切除联合非磁性眼内异物取出术，术中注入重水协助眼内异物取出。