Abstract: A series of positive-power aspheric ophthalmic lenses for correction of hypermetropia is described. A lens in the series is aspherically corrected on its anterior surface within an optically active region of diameter D1 which is less than the lens diameter D. The optically active region is surrounded by a border region bounded by diameters D1 and D, which can be constant for all dioptric powers. The border region can be matched to the optically active region in the region of D1 such that the difference in anterior surface sag between D1 and D may be made to be a constant for all dioptric powers. Lenses produced using this invention are thinner and lighter than prior-art lenses. Other advantages include predictable and constant edge thickness at diameter D1, and enhanced productivity and yield in certain manufacturing processes.

Abstract: A series of single-vision ophthalmic lenses for use in the correction of vision for myopia, hypermetropia, or astigmatism is described in which the series design is selected for the economic manufacture of, for example, thermoplastic ophthalmic lenses using injection molding. Injection molding methodology, when utilized appropriately, permits simplifications in the primary and secondary manufacture of ophthalmic lenses not usually practical when using other commonly-understood means of lens manufacture. Benefits of the lens series described include enhanced productivity of primary manufacture, improved cosmesis in certain types of secondary manufacture, and simplification of certain types of secondary manufacture that add further benefits to ophthalmic lenses following primary manufacture.