Multi-ring lens, systems and methods for extended depth of focus
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.
1. An ophthalmic lens, comprising:
a first surface and a second surface, the first and second surfaces disposed about an optical axis;
an aspherical refractive profile imposed on the first surface;
a diffractive profile imposed on the first or second surface and including a central zone and a peripheral zone, the central zone configured to distribute a first non-zero percentage of light toward a far focus and a second non-zero percentage of light toward an intermediate focus, wherein the first non-zero percentage of light is between 41% and 63% and the second non-zero percentage of light is between 21% and 41% the peripheral zone configured to distribute 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 third non-zero percentage of light is greater than the first non-zero percentage of light.
2. The ophthalmic lens of claim 1 , wherein a ratio of the third non-zero percentage of light to the fourth non-zero percentage of light is greater than a ratio of the first non-zero percentage of light to the second non-zero percentage of light.
3. The ophthalmic lens of claim 2 , wherein the ratio of the third non-zero percentage of light to the fourth non-zero percentage of light is 3:1.
4. The ophthalmic lens of claim 2 , wherein the ratio of the first non-zero percentage of light to the second non-zero percentage of light is 1:1.
5. The ophthalmic lens of claim 1 , wherein the third non-zero percentage of light is between 41% and 100% and the fourth non-zero percentage of light is between greater than 0% and 41%.
6. The ophthalmic lens of claim 1 , wherein the ophthalmic lens is an intraocular lens and the intermediate focus corresponds to an intraocular add power within a range between 1 Diopter and 2.5 Diopters.
7. The ophthalmic lens of claim 1 , wherein the central zone includes at least two echelettes.
8. The ophthalmic lens of claim 1 , wherein the diffractive profile is configured to compensate for ocular chromatic aberration, and the aspherical refractive profile is configured to compensate for ocular spherical aberration, and the aspherical refractive profile and the diffractive profile when combined provide an extended depth of focus for the ophthalmic lens.
9. A method for manufacturing an ophthalmic lens for a patient, the method comprising:
inputting an ophthalmic lens prescription for the patient; and
manufacturing the ophthalmic lens based on the ophthalmic lens prescription,
wherein the ophthalmic lens includes a first lens surface having an aspherical profile and a diffractive profile including a central zone and a peripheral zone on the first lens surface or a second lens surface, the central zone configured to distribute a first non-zero percentage of light toward a far focus and a second non-zero percentage of light toward an intermediate focus, wherein the first non-zero percentage of light is between 41% and 63% and the second non-zero percentage of light is between 21% and 41%, and the peripheral zone configured to distribute 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 third non-zero percentage of light is greater than the first non-zero percentage of light.
10. The method of claim 9 , wherein the ophthalmic lens is configured to provide a partial correction of a patient chromatic aberration in the far focus and a larger correction of the patient chromatic aberration in the intermediate focus.
11. The method of claim 10 , wherein the ophthalmic lens is configured to compensate for a patient spherical aberration.
12. The method of claim 9 , wherein a ratio of the third non-zero percentage of light to the fourth non-zero percentage of light is greater than a ratio of the first non-zero percentage of light to the second non-zero percentage of light.
13. The method of claim 9 , wherein the third non-zero percentage of light is between 41% and 100% and the fourth non-zero percentage of light is between greater than 0% and 41%.
14. An ophthalmic lens, comprising:
a first surface and a second surface, the first and second surfaces disposed about an optical axis;
an aspherical refractive profile imposed on the first surface;
a diffractive profile imposed on the first or second surface and including a central zone and a peripheral zone, the central zone configured to distribute a first non-zero percentage of light toward a far focus and a second non-zero percentage of light toward an intermediate focus, and the peripheral zone configured to distribute 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 third non-zero percentage of light is between 41% and 100% and the fourth non-zero percentage of light is between greater than 0% and 41%, and wherein the third non-zero percentage of light is greater than the first non-zero percentage of light.
15. The ophthalmic lens of claim 14 , wherein a ratio of the third non-zero percentage of light to the fourth non-zero percentage of light is greater than a ratio of the first non-zero percentage of light to the second non-zero percentage of light.
16. The ophthalmic lens of claim 15 , wherein the ratio of the third non-zero percentage of light to the fourth non-zero percentage of light is 3:1.
17. The ophthalmic lens of claim 15 , wherein the ratio of the first non-zero percentage of light to the second non-zero percentage of light is 1:1.
18. The ophthalmic lens of claim 14 , wherein the first non-zero percentage of light is between 41% and 63% and the second non-zero percentage of light is between 21% and 41%.
19. The ophthalmic lens of claim 14 , wherein the ophthalmic lens is an intraocular lens and the intermediate focus corresponds to an intraocular add power within a range between 1 Diopter and 2.5 Diopters.
20. The ophthalmic lens of claim 14 , wherein the central zone includes at least two echelettes.
21. A method for manufacturing an ophthalmic lens for a patient, the method comprising:
inputting an ophthalmic lens prescription for the patient; and
manufacturing the ophthalmic lens based on the ophthalmic lens prescription,
wherein the ophthalmic lens includes a first lens surface having an aspherical profile and a diffractive profile including a central zone and a peripheral zone on the first lens surface or a second lens surface, the central zone configured to distribute a first non-zero percentage of light toward a far focus and a second non-zero percentage of light toward an intermediate focus, and the peripheral zone configured to distribute 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 third non-zero percentage of light is between 41% and 100% and the fourth non-zero percentage of light is between greater than 0% and 41%, and wherein the third non-zero percentage of light is greater than the first non-zero percentage of light.
22. The method of claim 21 , wherein the ophthalmic lens is configured to provide a partial correction of a patient chromatic aberration in the far focus and a larger correction of the patient chromatic aberration in the intermediate focus.
23. The method of claim 22 , wherein the ophthalmic lens is configured to compensate for a patient spherical aberration.
24. The method of claim 21 , wherein a ratio of the third non-zero percentage of light to the fourth non-zero percentage of light is greater than a ratio of the first non-zero percentage of light to the second non-zero percentage of light.
25. The method of claim 21 , wherein the first non-zero percentage of light is between 41% and 63% and the second non-zero percentage of light is between 21% and 41%.