Single-vision ophthalmic lens series
AssigneeSola Internationl, Inc.
InventorRobert R. Zeidler
Life of this patent
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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.
Claims20
An ophthalmic lens series comprising a plurality of unitary lenses formed of an optical material of known refractive index, each lens having an anterior surface characterized by an anterior base curve and a posterior surface characterized by a posterior curve, the anterior base curve being selected from a group consisting of fewer than 10 curves.
An ophthalmic lens system comprising:
- (a) a finished ophthalmic lens series comprising a plurality of unitary lenses formed of an optical material of known refractive index, each lens having an anterior surface characterized by an anterior base curve and a posterior surface characterized by a posterior curve, the anterior base curve being selected from a group consisting of fewer than 10 curves;
- and
- (b) a semi-finished ophthalmic lens series comprising a plurality of lenses formed of an optical material of known refractive index, each lens having an anterior surface having the anterior base curve.
A method of manufacturing a unitary ophthalmic lens, the method comprising:
- selecting an anterior mold insert characterized by an anterior base curve selected from a group consisting of fewer than 10 curves;
- assembling a mold cavity including the anterior mold insert and a posterior mold insert characterized by a posterior curve;
- providing a moldable optical material to the mold cavity to form the lens;
- and
- removing the lens from the mold cavity,
- wherein the series comprises a group of lenses having a common anterior base curve.
Dependencies are inferred from the claim text.