Iol with varying correction of chromatic aberration
A lens and chromatic aberration technology, applied in the field of intraocular lenses, can solve problems such as reduced efficiency
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[0020] The present invention generally provides intraocular lenses with two diffractive structures having a common focus which are used in combination with optical filters to provide chromatic aberration in two different wavelength ranges to limit the color spectrum requiring correction. The first diffractive structure provides chromatic aberration correction for relatively long wavelengths above 550 nm, and the second diffractive structure surrounding the first diffractive structure provides chromatic aberration correction in the shorter wavelength range while allowing chromatic aberration in the longer wavelength range. In operation, the combination of diffractive structures provides good chromatic aberration correction for small pupil conditions. The outer diffractive elements function in large pupil conditions to provide sharp images at shorter wavelengths without chromatic aberration, corresponding to the peak sensitivity of the eye in low light conditions. The combinatio...
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