Patent ID: 8709079

Claim:
A monofocal ophthalmic lens having an optical power, comprising: An optical filter operable to filter out at least visible light having a wavelength less than 450 nm; a first monofocal diffractive structure adapted to produce a focus corresponding to the optical power for visible light in a first wavelength range above 550 nm and to reduce longitudinal chromatic aberration to less than one diopter for incoming visible light in the first wavelength range; a second monofocal diffractive structure outside the first diffractive structure in a radial direction and adapted to produce a focus for visible light corresponding to the optical power in a second wavelength range between 450 nm and 550 nm and to reduce longitudinal chromatic aberration for incoming visible light in the second wavelength range to less than one diopter while allowing longitudinal chromatic aberration in the first wavelength range in an amount greater than the first diffractive structure.