Limited echelette lens, systems and methods

摘要

An ophthalmic lens with a circular surface structure and limited adjacent echelettes that provides enhanced image quality across an extended range of foci.

主权项

1. An ophthalmic lens, comprising:
an anterior face and a posterior face, the faces disposed about an optical axis; at least one diffractive profile imposed on the anterior face or the posterior face, the at least one diffractive profile consisting of an inner echelette and from 1 to 4 peripheral echelettes, wherein the inner echelette and the 1 to 4 peripheral echelettes each comprises a parabolic optical zone; and a refractive region between an innermost one of the peripheral echelettes and the inner echelette, wherein the peripheral echelettes are not separated by a refractive region.