Patent ID: 7793535

Claim:
A method of testing the diffusion rate of an ophthalmic device comprising a pharmaceutical agent, wherein the method comprises the steps of (a) placing an ophthalmic lens comprising a pharmaceutical agent in the testing area of an apparatus comprising a male mold and a female mold, wherein said male mold comprises a convex testing surface an outer male surface, male seating ridge extending from the perimeter of the convex testing surface, and an aperture extending from said outer male surface to said convex testing surface, wherein said female mold comprises an outer female surface a concave testing surface, female seating ridge extending from the perimeter of the concave testing surface, and an aperture extending from said concave testing surface to said outer female surface, wherein when the male mold and the female mold are mated, the male seating ridge sits on the female seating ridge and creates a testing area between the male convex testing surface and the female concave testing surface. (b) adding a solution to the aperture of the male mold from the outer male surface, and (c) monitoring the solution that emerges from the aperture of the outer female surface to determine the presence or absence of the pharmaceutical agent wherein said convex testing surface comprises at least one radial groove extending from the aperture to the perimeter of the convex testing surface and at least one latitudinal groove that intersects the at least one radial groove.