an implantable keratoprosthesis having a central lenticule and a peripheral annulus of corneal tissue . the keratoprosthesis includes a transparent polymeric lenticule having an elongated stem with a generally cylindrical outer surface and a central axis . on one end thereof , the stem carries a dome having a peripheral skirt extending outwardly from the axis beyond the cylindrical surface of the stem . an annulus of corneal tissue has a central bore within which the stem is received , the peripheral skirt contacting and overlying a portion of the corneal annulus adjacent the bore . a portion of the annulus extends outwardly beyond the peripheral skirt for attachment to a surgically prepared cornea . a ring of polymeric material is received over the stem to capture between the ring and the skirt the corneal annulus . the ring is attached to the stem , as by welding and / or by use of a tissue - adherent , biologically acceptable adhesive disposed between the cylindrical surface of the stem and the bore of the annulus to form a strong , liquid - tight seal between the stem and annulus .