An ocular lens (32) has a refractive optics structure formed from apolyisobutylene-based material and a glassy segment that is non-reactive toocular fluid and that maintains in vivo transparency for a substantial timeperiod. The material has a central elastomeric polyolefinic block andthermoplastic end blocks (such as a triblock polymer backbone comprisingpolystyrene-polyisobutylene-polystyrene). The material is preferably flexiblesuch that the refractive optics structure can be folded upon itself andintroduced through a small scleral incision. The lens device includes an opticportion and preferably either an annular haptic element or one or more hapticelements adapted to rest within a capsular bag formed by a surgical procedure.A portion of the lens device may be loaded with at least one therapeutic agentthat interferes with proliferation of the epithelial cells of the eye toprotect against PCO.
