Lenses, devices and methods for ocular refractive error
Certain embodiments are directed to lenses, devices and/or methods. For example, a lens for an eye having an optical axis and an aberration profile along its optical axis, the aberration profile having a focal distance and including higher order aberrations having at least one of a primary spherical aberration component C(4,0) and a secondary spherical aberration component C(6,0). The aberration profile may provide, for a model eye with no aberrations and an on-axis length equal to the focal distance: (i) a peak, first retinal image quality (RIQ) within a through focus range that remains at or above a second RIQ over the through focus range that includes said focal distance, where the first RIQ is at least 0.35, the second RIQ is at least 0.1 and the through focus range is at least 1.8 Diopters; (ii) a RIQ of 0.3 with a through focus slope that improves in a direction of eye growth; and (iii) a RIQ of 0.3 with a through focus slope that degrades in a direction of eye growth. The RIQ may be Visual Strehl Ratio or similar measured along the optical axis for at least one pupil diameter in the range 3 mm to 6 mm, over a spatial frequency range of 0 to 30 cycles/degree inclusive and at a wavelength selected from within the range 540 nm to 590 nm inclusive.
1. A lens for an eye, the lens having an optical axis, a dioptric power and an aberration profile about the lens' optical axis, the aberration profile comprising:
higher order aberrations having at least one of a primary spherical aberration component (C(4,0)) and a secondary spherical aberration component (C(6,0)); and at least two additional spherical aberration terms selected from the group C(8,0) to C(20,0);
the aberration profile of the lens, when the lens is measured on a model eye, results in a through-focus retinal image quality profile that remains at or above a target retinal image quality threshold value over a through-focus range that includes a retina of the model eye;
wherein the target retinal image quality threshold value is at least 0.15 and the through focus range is at least 1.8D;
wherein the model eye has a refractive error matching the dioptric power of the lens and the model eye has no higher order aberrations; and
wherein the target retinal image quality threshold value is a visual Strehl ratio measured along the lens' optical axis for at least one pupil diameter of the model eye in a range of 3 mm to 6 mm, defined over a spatial frequency range of 0 to 30 cycles/degree inclusive and at a wavelength selected from within a range of 540 nm to 590 nm inclusive.
2. The lens of claim 1 , wherein the at least two additional spherical aberration terms are selected from the group of C(10,0) and C(20,0).
3. The lens of claim 2 , wherein the target retinal image quality threshold value is at least 0.175, 0.2, 0.225 or 0.25.
4. The lens of claim 3 , wherein the through-focus range is at least 1.9D, 2D, 2.1D, 2.2D or 2.3D.
5. The lens of claim 4 , wherein an end of the through focus range is a negative power end or behind the retina of the model eye.
6. The lens of claim 5 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.
7. The lens of claim 4 , wherein an end of the through focus range is a positive power end or in front of the retina of the model eye.
8. The lens of claim 7 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.
9. The lens of claim 1 , wherein the at least two additional spherical aberration terms are selected from the group of C(12,0) and C(20,0).
10. The lens of claim 1 , wherein the aberration profile comprises at least three additional spherical aberration terms selected from the group of C(8,0) to C(20,0).
11. The lens of claim 10 , wherein the target retinal image quality threshold value is at least 0.175, 0.2, 0.225 or 0.25.
12. The lens of claim 11 , wherein the through-focus range is at least 1.9D, 2D, 2.1D, 2.2D or 2.3D.
13. The lens of claim 12 , wherein an end of the through focus range is a negative power end or behind the retina of the model eye.
14. The lens of claim 13 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.
15. The lens of claim 12 , wherein an end of the through focus range is a positive power end or in front of the retina of the model eye.
16. The lens of claim 15 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.
17. The lens of claim 1 , wherein the aberration profile comprises at least four additional spherical aberration terms selected from the group of C(8,0) to C(20,0).
18. The lens of claim 1 , wherein the target retinal image quality threshold value is at least 0.175, 0.2, 0.225 or 0.25.
19. The lens of claim 18 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.
20. The lens of claim 18 , wherein the through-focus range is at least 1.9D, 2D, 2.1D, 2.2D or 2.3D.
21. The lens of claim 20 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.
22. The lens of claim 18 , wherein an end of the through focus range is a negative power end or behind the retina of the model eye.
23. The lens of claim 22 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.
24. The lens of claim 18 , wherein an end of the through focus range is a positive power end or in front of the retina of the model eye.
25. The lens of claim 24 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.
26. The lens of claim 1 , wherein the through-focus range is at least 1.9D, 2 D, 2.1D, 2.2D or 2.3D.
27. The lens of claim 26 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.
28. The lens of claim 26 , wherein an end of the through focus range is a negative power end or behind the retina of the model eye.
29. The lens of claim 28 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.
30. The lens of claim 26 , wherein an end of the through focus range is a positive power end or in front of the retina of the model eye.
31. The lens of claim 30 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.
32. The lens of claim 1 , wherein an end of the through focus range is a negative power end or behind the retina of the model eye.
33. The lens of claim 32 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.
34. The lens of claim 1 , wherein an end of the through focus range is a positive power end or in front of the retina of the model eye.
35. The lens of claim 34 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.
36. The lens of claim 1 , wherein the at least one pupil diameter is all pupil diameters in the range of 3 mm to 5 mm.