“…51,79 The Vitrasert 1 reservoir-type device (Chiron Vision Inc., Irvine, CA), composed of drug and polymeric coats of polyvinyl alcohol (PVA) and ethylene vinyl acetate (EVA). The device is implanted in patients requiring the treatment of CMV-R. PVA, a permeable polymer regulates the rate of ganciclovir permeation through the device (Fig.…”