title: Vitrectomy, a pars plana approach. Instrumentation.
mesh_terms: D006801:Humans; D007429:Intraocular Pressure; D008722:Methods; D008853:Microscopy; D009885:Ophthalmology / Q000295:instrumentation; D013525:Surgical Instruments; D014822:Vitreous Body / Q000601:surgery*