Patent ID: 7225919

Claim:
A blister package containing at least one contact lens loaded into a respective concave cavity formed in the package, the package having the characteristics (a) the or each cavity is generally circularly symmetrical; (b) the average radius of curvature in the internal surface of the or each cavity is less than 10 millimetres; (c) the vertical clearance between the sagittal height of a contact lens in the package and the internal height of the respective cavity into which that contact lens is loaded is less than 2.2 millimetres; and (d) the ratio of the diameter of the rim of the or each cavity to the diameter of the respective contact lens loaded into that cavity is less than 1.3; wherein the or each cavity contains a single contact lens and a respective quantity of preservative fluid, and wherein the inner surface of the or each cavity is formed as a part-spherical surface with localised deviations from part-sphericity, the localized deviations being shaped to allow fluid to enter between that inner surface and the lens so as to break capillary attraction between that inner surface and the lens.