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US 10,299,911 B2Granted
Aspherical multifocal intraocular lens
AssigneeLenstec Barbados Inc.
InventorJohn Clough
Life of this patent
Estimating the term…
Abstract
A multifocal intraocular lens has an anterior lens surface which includes a first optic of a first radius and a second optic of a different radius. The posterior surface of the lens include an aspheric surface.
Claims8
A bifocal lens comprising:
- a posterior lens surface having a first radius of curvature
- an anterior aspheric lens surface, said anterior aspheric lens surface having a first aspheric distance optic portion having a radius of curvature equal to the first radius of curvature of the posterior lens surface and
- a second near optic portion having a radius of curvature less than that of the first portion thereby forming a second optic surface on the anterior lens surface,
- the first aspheric distance optic portion having a perimeter and the second near optic portion having an outer perimeter,
- a flat surface extending outwardly from the entire radially outer perimeter of the anterior lens near optic portion.
2 more elements
A method of improving the eyesight of a human comprising:
- 5. making an incision in an eye of the human;
- 6. removing a natural lens of the eye;
- and
- 7. implanting an intraocular lens, wherein the intraocular lens comprises:
- 8. a posterior surface, wherein the posterior surface has a radius of curvature and
- an anterior aspheric lens surface, said anterior aspheric lens surface having a first aspheric distance optic portion having a radius of curvature equal to the radius of curvature of the posterior surface,
- a second near optic portion having a radius of curvature less than that of the first aspheric distance optic portion thereby forming a second optic surface on the anterior lens surface,
- the first aspheric distance optic portion having a perimeter and the second near optic portion having an outer perimeter,
- a flat surface extending outwardly from the entire radially outer perimeter of the anterior lens near optic portion.
6 more elements
Dependencies are inferred from the claim text.