Patent ID: 7670371

Claim:
A multifocal ophthalmic lens suitable for treatment of any of a population of patients, each patient of the population having an eye with an associated pre-treatment vision quality, an associated cornea chromatic aberration, and an associated positive cornea spherical aberration sufficient to limit an associated potential post-spherical-treatment vision quality if the eye of the patient were treated with a spherical lens, the multifocal ophthalmic lens comprising: a lens material; the lens material defining a first surface and a second surface; wherein the first surface comprises a first surface curvature; wherein the second surface comprises a diffractive pattern imposed on a second surface curvature; wherein at least one of the first surface curvature and the second surface curvature has an asphericity, the asphericity being characterized by a conic constant, a fourth order aspheric coefficient, or a sixth order aspheric coefficient, or a combination thereof, the asphericity providing the multifocal ophthalmic lens with a negative spherical aberration sufficient to mitigate the positive cornea spherical aberrations of the population of patients such that, for each patient of the population, a post-treatment vision quality, when the eye of the patient is treated with the multifocal ophthalmic lens, exceeds the associated potential post spherical treatment vision quality of the patient; wherein the first surface curvature, the second surface curvature, and the diffractive pattern define a near focus and a far focus of the multifocal ophthalmic lens; and wherein the diffractive pattern of the multifocal ophthalmic lens mitigates an average of the cornea chromatic aberrations of the population for at least one focus selected from the group consisting of the near focus and the far focus.