Single microstructure lens, systems and methods
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 a circular surface structure which acts as a diffractive or phase shifting profile. In some cases, a single ring IOL includes an anterior face and a posterior face, where a profile can be imposed on the anterior or posterior surface or face. The profile can have an inner portion such as a microstructure or central echelette, and an outer portion. Between the inner portion and the outer portion, there may be a transition zone that connects the inner and outer portions.
1. An ophthalmic lens comprising:
an anterior face and an opposing posterior face, the faces disposed about an optical axis;
and only one isolated echelette imposed on either the anterior face or the posterior face, wherein the face opposing the face upon which the isolated echelette is located has a toric profile.
2. An ophthalmic lens comprising:
an anterior face and an opposing posterior face, the faces disposed about an optical axis;
and only one isolated echelette imposed on either the anterior face or the posterior face, wherein the isolated echelette is disposed within a central zone of the lens.
3. The ophthalmic lens of claim 2 , wherein the face opposing the face upon which the isolated echelette is located has a toric profile.
4. An ophthalmic lens comprising:
an anterior face and an opposing posterior face, the faces disposed about an optical axis;
and only one isolated echelette imposed on either the anterior face or the posterior face, wherein the isolated echelette surrounds a central refractive zone of the lens.
5. The ophthalmic lens of claim 4 , wherein the face opposing the face upon which the isolated echelette is located has a toric profile.
6. An ophthalmic lens comprising:
an anterior face and an opposing posterior face, the faces disposed about an optical axis;
and only one isolated echelette imposed on either the anterior face or the posterior face, wherein the lens comprises a peripheral zone that surrounds the isolated echelette.
7. The ophthalmic lens of claim 6 , wherein the face opposing the face upon which the isolated echelette is located has a toric profile.
8. The ophthalmic lens of claim 6 , wherein the isolated echelette is disposed within a central zone of the lens.
9. The ophthalmic lens of claim 6 , wherein the isolated echelette surrounds a central refractive zone of the lens.
10. An ophthalmic lens comprising:
an anterior face and an opposing posterior face, the faces disposed about an optical axis;
and only one isolated echelette imposed on either the anterior face or the posterior face, wherein the isolated echelette is characterized by a surface area between 1 and 7 square millimeters.
11. The ophthalmic lens of claim 10 , wherein the isolated echelette has a diameter within a range from about 1 mm to about 5 mm.
12. The ophthalmic lens of claim 10 , wherein the face opposing the face upon which the isolated echelette is located has a toric profile.
13. The ophthalmic lens of claim 10 , wherein the isolated echelette is disposed within a central zone of the lens.
14. The ophthalmic lens of claim 10 , wherein the isolated echelette surrounds a central refractive zone of the lens.
15. The ophthalmic lens of claim 10 , wherein the lens comprises a peripheral zone that surrounds the isolated echelette.
16. An ophthalmic lens comprising:
an anterior face and an opposing posterior face, the faces disposed about an optical axis;
and only one isolated echelette imposed on either the anterior face or the posterior face, wherein the isolated echelette is characterized by a parabolic curve.
17. The ophthalmic lens of claim 16 , wherein the face opposing the face upon which the isolated echelette is located has a toric profile.
18. The ophthalmic lens of claim 16 , wherein the isolated echelette is disposed within a central zone of the lens.
19. The ophthalmic lens of claim 16 , wherein the isolated echelette surrounds a central refractive zone of the lens.
20. The ophthalmic lens of claim 16 , wherein the lens comprises a peripheral zone that surrounds the isolated echelette.
21. The ophthalmic lens of claim 16 , wherein the isolated echelette is characterized by a surface area between 1 and 7 square millimeters.
22. An ophthalmic lens comprising:
an anterior face and an opposing posterior face, the faces disposed about an optical axis;
and only one isolated echelette imposed on either the anterior face or the posterior face, wherein the lens further comprises a peripheral portion characterized by a spherical curve or an aspherical curve, and wherein the peripheral portion has a refractive profile.
23. The ophthalmic lens of claim 22 , wherein the face opposing the face upon which the isolated echelette is located has a toric profile.
24. The ophthalmic lens of claim 22 , wherein the isolated echelette is disposed within a central zone of the lens.
25. The ophthalmic lens of claim 22 , wherein the isolated echelette surrounds a central refractive zone of the lens.
26. The ophthalmic lens of claim 22 , wherein the isolated echelette is characterized by a surface area between 1 and 7 square millimeters.
27. The ophthalmic lens of claim 22 , wherein the isolated echelette is characterized by a parabolic curve.
28. An ophthalmic lens comprising:
an anterior face and an opposing posterior face, the faces disposed about an optical axis;
and only one isolated echelette imposed on either the anterior face or the posterior face, wherein the isolated echelette is 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 face opposing the face upon which the isolated echelette is located has a toric profile.
30. The ophthalmic lens of claim 28 , wherein the isolated echelette is disposed within a central zone of the lens.
31. The ophthalmic lens of claim 28 , wherein the isolated echelette surrounds a central refractive zone of the lens.
32. The ophthalmic lens of claim 28 , wherein the lens comprises a peripheral zone that surrounds the isolated echelette.
33. The ophthalmic lens of claim 28 , wherein the isolated echelette is characterized by a surface area between 1 and 7 square millimeters.
34. The ophthalmic lens of claim 28 , wherein the isolated echelette is characterized by a parabolic curve.
35. The ophthalmic lens of claim 28 , wherein the lens further comprises a peripheral portion characterized by a spherical curve or an aspherical curve, and wherein the peripheral portion has a refractive profile.
36. An ophthalmic lens comprising:
an anterior face and an opposing posterior face, the faces disposed about an optical axis;
and only one isolated echelette imposed on either the anterior face or the posterior face, wherein the lens provides an MTF volume of at least 35% over a continuous range of at least about 0.75 D.
37. The ophthalmic lens of claim 36 , wherein the face opposing the face upon which the isolated echelette is located has a toric profile.
38. The ophthalmic lens of claim 36 , wherein the isolated echelette is disposed within a central zone of the lens.
39. The ophthalmic lens of claim 36 , wherein the isolated echelette surrounds a central refractive zone of the lens.
40. The ophthalmic lens of claim 36 , wherein the lens comprises a peripheral zone that surrounds the isolated echelette.
41. The ophthalmic lens of claim 36 , wherein the isolated echelette is characterized by a surface area between 1 and 7 square millimeters.
42. The ophthalmic lens of claim 36 , wherein the isolated echelette is characterized by a parabolic curve.
43. The ophthalmic lens of claim 36 , wherein the lens further comprises a peripheral portion characterized by a spherical curve or an aspherical curve, and wherein the peripheral portion has a refractive profile.
44. The ophthalmic lens of claim 36 , wherein the isolated echelette is characterized by a step height having a value within a range from about 0.5 μm and about 4 μm.