Limited echellette lens, systems and methods
An ophthalmic lens with a circular surface structure and limited adjacent echelettes that provides enhanced image quality across an extended range of foci.
1. An ophthalmic lens, comprising:
an anterior face and a posterior face, the faces disposed about an optical axis; and
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 1 or 2 peripheral echelettes,
wherein the inner echelette and the 1 or 2 peripheral echelettes have respective sizes determined by a plural set of measured pupil dynamics;
wherein the plural set of measured pupil dynamics is measured in a plurality of light levels.
2. The ophthalmic lens of claim 1 , wherein at least 2 echelettes are not adjacent to each other.
3. The ophthalmic lens of claim 2 , wherein the at least 2 echelettes that are not adjacent to each other are separated by a refractive region.
4. The ophthalmic lens of claim 2 , wherein the at least 2 echelettes are not separated by a refractive region.
5. The ophthalmic lens of claim 1 , wherein the inner echelette and the peripheral echelette(s) are not separated by a refractive region.
6. The ophthalmic lens of claim 1 , wherein the echelettes further comprise of transitions characterized by a step height having a value within a range from about 0.5 μm and about 4 μm.
7. The ophthalmic lens of claim 6 , wherein the step height for at least 2 echelettes differ.
8. The ophthalmic lens of claim 6 , wherein the surface area for at least 2 echelettes differ.
9. The ophthalmic lens of claim 1 , wherein the inner echelette and the peripheral echelettes are characterized by a constant phase shift.
10. The ophthalmic lens of claim 1 further comprising an outer echelette, wherein the inner and outer echelettes have varying step heights.
11. The ophthalmic lens of claim 1 , wherein the set of measured pupil dynamics is based on a group of patients.
12. An ophthalmic lens, comprising:
an anterior face and a posterior face, the faces disposed about an optical axis; and
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 1 or 2 peripheral echelettes, wherein the inner echelette and the 1 or 2 peripheral echelettes have respective sizes determined by a plural set of measured pupil dynamics;
wherein the set of measured pupil dynamics is measured in a plurality of accommodative efforts.
13. An ophthalmic lens, comprising:
an anterior face and a posterior face, the faces disposed about an optical axis; and
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 1 or 2 peripheral echelettes, wherein the inner echelette and the 1 or 2 peripheral echelettes have respective sizes has a size determined by a plural set of measured pupil dynamics;
wherein the set of measured pupil dynamics is measured in bright light, in dim light, during far vision, during near vision, and in a plurality of different combinations of the light levels and the accommodative efforts.
14. The ophthalmic lens of claim 12 , wherein at least 2 echelettes are not adjacent to each other.
15. The ophthalmic lens of claim 14 , wherein the at least 2 echelettes that are not adjacent to each other are separated by a refractive region.
16. The ophthalmic lens of claim 14 , wherein the at least 2 echelettes are not separated by a refractive region.
17. The ophthalmic lens of claim 12 , wherein the inner echelette and the peripheral echelette(s) are not separated by a refractive region.
18. The ophthalmic lens of claim 12 , wherein the echelettes further comprise of transitions characterized by a step height having a value within a range from about 0.5 μm and about 4 μm.
19. The ophthalmic lens of claim 18 , wherein the step height for at least 2 echelettes differ.
20. The ophthalmic lens of claim 18 , wherein the surface area for at least 2 echelettes differ.
21. The ophthalmic lens of claim 12 , wherein the inner echelette and the peripheral echelettes are characterized by a constant phase shift.
22. The ophthalmic lens of claim 12 further comprising an outer echelette, wherein the inner and outer echelettes have varying step heights.
23. The ophthalmic lens of claim 12 , wherein the set of measured pupil dynamics is based on a group of patients.
24. The ophthalmic lens of claim 13 , wherein at least 2 echelettes are not adjacent to each other.
25. The ophthalmic lens of claim 24 , wherein the at least 2 echelettes that are not adjacent to each other are separated by a refractive region.
26. The ophthalmic lens of claim 24 , wherein the at least 2 echelettes are not separated by a refractive region.
27. The ophthalmic lens of claim 13 , wherein the inner echelette and the peripheral echelette(s) are not separated by a refractive region.
28. The ophthalmic lens of claim 13 , wherein the echelettes further comprise of transitions characterized by a step height having a value within a range from about 0.5 μm and about 4 μm.
29. The ophthalmic lens of claim 28 , wherein the step height for at least 2 echelettes differ.
30. The ophthalmic lens of claim 28 , wherein the surface area for at least 2 echelettes differ.
31. The ophthalmic lens of claim 13 , wherein the inner echelette and the peripheral echelettes are characterized by a constant phase shift.
32. The ophthalmic lens of claim 13 further comprising an outer echelette, wherein the inner and outer echelettes have varying step heights.
33. The ophthalmic lens of claim 13 , wherein the set of measured pupil dynamics is based on a group of patients.