Patent ID: 7862532

Claim:
A punctum plug for implantation in the lacrimal drainage system of the eye, comprising an anchor member having a forward end surface, a rearward end surface and a main section extending longitudinally between said forward end surface and said rearward end surface, said main section having an outer surface; a proximal cap having a forward end wall; a body connecting said rearward end surface to said forward end wall and having a central longitudinal axis coaxial with a central longitudinal axis of said punctum plug; a plurality of depressions in said anchor member extending longitudinally along said outer surface, said depressions presenting voids open along said outer surface during insertion of said punctum plug in the lacrimal drainage system; and one or more strengthening protrusions on said rearward end surface, each of said protrusions being centered on a center axis of said protrusion that is located on said rearward end surface at a radially offset location from said central longitudinal axis of said body, said anchor member being insertable through the punctal opening of the lacrimal drainage system and into the canalicular canal communicating with the punctal opening with said cap remaining exposed in the eye in an implanted position for said punctum plug in the lacrimal drainage system.