A method of designing an aspheric ophthalmic lens with both refractive anddiffractive powers that is capable of reducing chromatic aberration and atleast one monochromatic aberration of an eye comprises combining asphericalrefractive and diffractive surfaces, selecting an appropriate eye model,establishing a design lens having at least one aspheric surface with acapacity to reduce monochromatic aberration in said eye model, establishing adiffractive lens element that corrects for chromatic aberration of the modeleye； and adjusting the lens surface design in order to obtain a suitably highpolychromatic image quality in a form that is weighted to comply with aspectral merit function.
