An instrument called a vitreous infusion suction cutter (VISC) was designed for the performance of vitrectomy through the pars plana of the eye. The instrument combines several features: cutting, removal, and replacement of vitreous. The action of the instrument is observed through the pupil with an operating microscope and a fundus contact lens. The posterior part of the eye is illuminated with a slit illuminator under conditions similar to slit-lamp observation of the vitreous and retina.
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