Multi-ring lens, systems and methods for extended depth of focus

摘要

Systems and methods for providing enhanced image quality across a wide and extended range of foci encompass vision treatment techniques and ophthalmic lenses such as contact lenses and intraocular lenses (IOLs). Exemplary IOL optics can include an aspheric refractive profile imposed on a first or second lens surface, and a diffractive profile imposed on a first or second lens surface. The aspheric refractive profile can focus light toward a far focus. The diffractive profile can include a central zone that distributes a first percentage of light toward a far focus and a second percentage of light toward an intermediate focus. The diffractive profile can also include a peripheral zone, surrounding the central zone, which distributes a third percentage of light toward the far focus and a fourth percentage of light toward the intermediate focus.

主权项

1. An ophthalmic lens, comprising:
a first surface and a second surface, the first and second surfaces disposed about an optical axis; an aspheric refractive profile imposed on the first or second surface; and a diffractive profile imposed on the first or second surface, wherein the aspheric refractive profile focuses light toward a far focus, and wherein the diffractive profile comprises a central zone that distributes a first non-zero percentage of light toward a far focus and a second non-zero percentage of light toward an intermediate focus, and a peripheral zone, surrounding the central zone, that distributes a third non-zero percentage of light toward the far focus and a fourth non-zero percentage of light toward the intermediate focus, wherein the percentage of light distributed by the peripheral zone toward the far focus is 63% and the percentage of light distributed by the peripheral zone toward the intermediate focus is 21%.