Patent ID: 8821457

Claim:
A lacrimal insert, the lacrimal insert comprising: a housing including a flange portion, a substantially cylindrical portion, and a diamond shaped cross-section portion, the housing also including at least one opening in fluid communication with a reservoir defined by the housing; a drug core including one or more therapeutic agents, the drug core being positioned within the reservoir defined by the housing and comprising a substantially cylindrical portion and a diamond-shaped cross-section portion the drug core taking the shape of and filling the reservoir, and making contact with the housing, the substantially cylindrical portions of the housing and the drug core and the diamond shaped cross-section portions of the housing and the drug core being aligned with one another to form a complimentary fit to prevent movement of the drug core relative to the housing; and a barrier layer affixed to at least one of the housing and the drug core, the barrier layer being configured to inhibit the diffusion of the therapeutic agent through the housing.