Methods and devices for refractive treatments of presbyopia
View Patent ↗Presbyopia in a patient's eye is treated by inducing spherical aberration in the central section of the pupil, while the peripheral section of the pupil is treated in a manner other than the central section of the pupil. For example, the peripheral section of the pupil may remain untreated, or high-order aberration may be controlled, and/or a second area of spherical aberration may be provided with different focus power.
1. A multifocal ophthalmic lens for an eye, the lens being configured as an implantable lens or wearable lens and comprising:
a baseline Diopter power extending across all of the lens for refractive correction of at least one of a focus error and astigmatism;
wherein a central section of the lens includes spherical aberration and an optional focus offset, wherein the central section covers a central pupil section that is smaller than a natural pupil; and
wherein the spherical aberration is represented by a polynomial term and a change of refractive power occurs from the baseline Diopter power at a boundary of the central section.
2. The lens of claim 1 , wherein the central section of the lens has a diameter that is between 1.5 mm and 4 mm, inclusive.
3. The lens of claim 1 , wherein the lens has a diameter between 3 mm to 40 mm, inclusive.
4. The lens of claim 1 , wherein the spherical aberration in the central section is represented by more than one polynomial term.
5. The lens of claim 1 , wherein the spherical aberration in the central section of the lens has a peak-to-valley wavefront error of more than 1 micron.
6. The lens of claim 1 , wherein the lens is further configured to reduce high-order Zernike aberration in the eye.
7. The lens claim 1 , wherein the spherical aberration in the central section of the lens includes a positive spherical aberration in a first zone and a negative spherical aberration in a second zone.
8. The lens of claim 1 , wherein the spherical aberration is determined based on a natural pupil size of the eye under at least one luminance condition.
9. A multifocal and refractive corrective ophthalmic lens for an eye, the lens being configured as an implantable lens or wearable lens and comprising:
a plurality of optical sections;
wherein at least two of the plurality of optical sections having different focus power and spherical aberration;
wherein the at least two optical sections are concentrically arranged to form an inner optic section and an outer optic section, wherein the inner optic section covers a portion of the pupil that is smaller than a natural pupil;
wherein the different focus power and spherical aberration creating a change in refractive power at an interface between the at least two of the plurality of optical sections, and
wherein the spherical aberration is represented by a polynomial term.
10. The lens of claim 9 , wherein the spherical aberration of the inner optic section is configured to increase focus depth when the eye has a natural pupil size of equal or less than 4 mm in diameter.
11. The lens of claim 9 , wherein the spherical aberration of the inner optic section has a peak-to-valley wavefront error of more than 1 micron.
12. The lens of claim 9 , wherein the spherical aberration in at least one of the plurality of optical sections is determined based on the natural pupil size of the eye under at least one luminance condition.
13. The lens of claim 9 , wherein the spherical aberration in the outer optic section is configured to reduce spherical aberration that naturally exists in an eye.
14. The lens of claim 9 , wherein the spherical aberration of the inner optical section is represented by more than one polynomial term.
15. The lens of claim 14 , further comprising reducing or eliminating astigmatism in the eye.
16. A multifocal ophthalmic lens for an eye, the lens configured as implantable and wearable and comprising:
(a) a central optical section having a first focus power and a first spherical aberration, wherein the central optical section covers a central pupil section that is smaller than a natural pupil;
(b) a middle section that absorbs light energy; and
(c) an outer section having a second focus power and a second spherical aberration;
wherein the first focus power is different from the second focus power; and
wherein the first spherical aberration and second spherical aberration are different and create a change in refractive power at a location between the central optical section and the outer optical section.
17. The lens of claim 16 , wherein focus error or astigmatism in the eye is reduced or eliminated.
18. The lens of claim 16 , wherein the central optical section is further divided into two concentric optical sections having spherical aberrations of opposite signs.