title: Vitrectomy via the pars plana--a new instrument system.
mesh_terms: D000368:Aged; D000818:Animals; D006801:Humans; D008297:Male; D008722:Methods; D009885:Ophthalmology / Q000295:instrumentation*; D019721:Ophthalmoscopes; D011817:Rabbits; D013525:Surgical Instruments; D014822:Vitreous Body / Q000601:surgery*