Ophthalmic lenses having an extended depth of focus for improving intermediate vision

A method of treating a vision disorder, comprising:

• inserting an ophthalmic lens within a capsular bag of a patient's eye, the ophthalmic lens comprising:
• an optic having an anterior surface and a posterior surface disposed about an optical axis,
• at least one of the anterior and posterior surfaces having a surface profile corresponding to:
• a phase shift structure characterized by an inner region, an outer region, and a transition region, wherein,
• the inner region extends radially from the optical axis to a first boundary;
• the transition region is disposed between the inner region and the outer region and extends radially from the first boundary to a second boundary, wherein the transition region is adapted such that a phase of radiation incident thereon varies linearly over at least a portion of the radial extent between the first boundary and the second boundary so as to generate a phase shift between the first and second boundaries, the second boundary disposed at a radial distance further from the optical axis than the first boundary;
• and
• the outer region extends radially from the second boundary towards an outermost edge of the optic;
• a zonal structure having an inner power zone having a first curvature and an outer transition zone having a second curvature, wherein the inner power zone extends radially from the optical axis to the second boundary and the outer transition zone extends radially to a third boundary, the third boundary disposed at a radial distance further from the optical axis than the second boundary;
• and
• a base curvature extending radially from the third boundary to the outermost edge of the optic.