Multifocal ophthalmic lens

A method of designing an improved multifocal intraocular lens, comprising:

• providing a multifocal lens having a diffractive pattern formed thereon;
• providing an optical system comprising the multifocal lens and a corneal model;
• calculating a wavefront monochromatic aberration resulting from an optical system;
• and
• re-modeling a surface of the multifocal lens to have an aspheric component that is selected to reduce the wavefront monochromatic aberration;
• wherein the diffractive pattern includes an apodization zone configured to gradually shift energy from a first focus of the multifocal lens to a second focus of the multifocal lens.

A method of designing a multifocal intraocular lens, comprising:

• representing a cornea by a prolate surface, the cornea producing a monochromatic aberration to a wavefront in the eye;
• providing a diffractive intraocular lens having a base focus and an additional focus;
• and
• selecting a surface of the diffractive intraocular lens such that an optical system comprising the intraocular lens and the cornea provides reduction of the monochromatic aberration in a wavefront passing through the optical system for at least one of the foci;
• wherein the diffractive intraocular lens comprises a diffractive surface and a refractive surface opposite the diffractive surface, the refractive surface having an aspheric component selected to obtained reduced aberrations for at least one of the foci.

A method of designing a multifocal intraocular lens, comprising:

• representing a cornea by a prolate surface, the cornea producing a monochromatic aberration to a wavefront in the eye;
• providing a diffractive intraocular lens having a base focus and an additional focus;
• and
• selecting a surface of the diffractive intraocular lens such that an optical system comprising the intraocular lens and the cornea provides reduction of the monochromatic aberration in a wavefront passing through the optical system for at least one of the foci;
• wherein a light distribution between the base focus and the additional focus is between 70%:30% to 30%:70%.

A method of designing a multifocal intraocular lens, comprising:

• representing a cornea by a prolate surface, the cornea producing a monochromatic aberration to a wavefront in the eye;
• providing a diffractive intraocular lens having a base focus and an additional focus;
• and
• selecting a surface of the diffractive intraocular lens such that an optical system comprising the intraocular lens and the cornea provides reduction of the monochromatic aberration in a wavefront passing through die optical system for at least one of the foci;
• wherein a light distribution between the base focus and the additional focus is 50%:50%.