we retrospectively evaluated the vitac ( vitreous-tissue aspiration cutter ) , a portable vitrectomy system with an end-cutting vitrectomy probe with a self-sharpening oscillating blade and a monoblock design , in 110 vitrectomy procedures , 34 performed at the university of california davis medical center and 76 performed at the eye and ent hospital in shanghai , china .
C0042903
vitrectomy
C0015392
eye