Intraocular lenses that improve peripheral vision
Lenses and methods are provided for improving peripheral and/or central vision for patients who suffer from certain retinal conditions that reduce central vision or patients who have undergone cataract surgery. The lens is configured to improve vision by having an optic configured to focus light incident along a direction parallel to an optical axis at the fovea in order to produce a functional foveal image. The optic is configured to focus light incident on the patient's eye at an oblique angle with respect to the optical axis at a peripheral retinal location disposed at a distance from the fovea, the peripheral retinal location having an eccentricity between −30 degrees and 30 degrees. The image quality at the peripheral retinal location is improved by reducing at least one optical aberration at the peripheral retinal location. The method for improving vision utilizes ocular measurements to iteratively adjust the shape factor of the lens to reduce peripheral refractive errors.
1. An intraocular lens (IOL) configured to improve vision for a patient's eye, the intraocular lens comprising:
an optic comprising:
an anterior surface having a first curvature; and
a posterior surface opposite the anterior surface, the posterior surface having a second curvature greater than the first curvature of the anterior surface, the anterior surface and the second posterior surface intersected by an optical axis,
wherein the anterior surface is concave, and the posterior surface is convex,
wherein the optic comprises a meniscus lens having the anterior surface and the posterior surface,
wherein the optic is configured to focus light incident along a direction parallel to the optical axis at the fovea to produce a functional foveal image,
wherein the optic is configured to focus light incident on the patient's eye at an oblique angle between about 1 degree and about 30 degrees with respect to the optical axis at a peripheral retinal location disposed at a distance from the fovea, the peripheral retinal location having an eccentricity between −30 degrees and 30 degrees with respect to the optical axis, and
wherein image quality at the peripheral retinal location is improved by reducing at least one optical aberration at the peripheral retinal location.
2. The intraocular lens of claim 1 , wherein the at least one optical aberration is selected from the group consisting of defocus and peripheral astigmatism.
3. The intraocular lens of claim 1 , wherein the first or the second surface comprises a plurality of optical features that are configured to reduce the at least one optical aberration.
4. The intraocular lens of claim 1 , wherein the optic is a meniscus lens with a vertex curving inwards from edges of the optic.
5. The intraocular lens of claim 1 , wherein the optic has a thickness between about 0.7 mm and about 1.4 mm.
6. The intraocular lens of claim 1 , wherein the optic is configured to improve image quality at the peripheral retinal location by reducing at least one of peripheral defocus or astigmatism by adjusting at least one of shape factor of the optic, thickness of the optic, position of the optic from the iris or asphericity of a surface of the optic.
7. The intraocular lens of claim 6 , wherein the shape factor of the optic is between about −1 and −3.
8. An intraocular lens (LOL) configured to improve vision for a patient's eye, the intraocular lens comprising:
an optic comprising:
an anterior aspheric surface; and
a posterior aspheric surface opposite the anterior aspheric surface, the anterior aspheric surface and the posterior aspheric surface intersected by an optical axis,
wherein the anterior aspheric surface is concave, and the posterior aspheric surface is convex,
wherein the optic comprises a meniscus lens having the anterior aspheric surface and the posterior aspheric surface,
wherein the optic is configured to focus light incident along a direction parallel to the optical axis at the fovea to produce a functional foveal image,
wherein the optic is configured to focus light incident on the patient's eye at an oblique angle with respect to the optical axis at a peripheral retinal location disposed at a distance from the fovea, the peripheral retinal location having an eccentricity between −30 degrees and 30 degrees with respect to the optical axis,
wherein image quality at the peripheral retinal location is improved by reducing at least one optical aberration at the peripheral retinal location, the at least one optical aberration comprising peripheral astigmatism,
wherein peripheral astigmatism for visual field angles between −30 degrees and 30 degrees with respect to the optical axis is less than about 1.5 Diopter when the optic is implanted in a normal human eye.
9. The intraocular lens of claim 8 , wherein the optic has a thickness between about 0.7 mm and about 1.4 mm.
10. The intraocular lens of claim 8 , wherein the optic has a shape factor between −0.9 and −2.0.
11. The intraocular lens of claim 8 , wherein the optic has a peripheral defocus less than about 1.5 Diopter for visual field angles between −30 degrees and 30 degrees with respect to the optical axis.
12. The intraocular lens of claim 8 , the first or the second surface comprises an achromatic optical element.
13. An intraocular lens (IOL) configured to improve vision for a patient's eye, the intraocular lens comprising:
an optic comprising:
an anterior surface configured to receive ambient incident light; and
a posterior surface opposite the anterior surface, the anterior surface and the second posterior surface intersected by an optical axis, a curvature of the posterior surface configured to provide refractive optical power,
wherein the anterior surface is concave, and the posterior surface is convex,
wherein the optic comprises a meniscus lens having the anterior surface and the posterior surface,
wherein the optic is configured to focus light incident along a direction parallel to the optical axis at the fovea to produce a functional foveal image,
wherein the optic is configured to focus light incident on the patient's eye at an oblique angle with respect to the optical axis at a peripheral retinal location disposed at a distance from the fovea, the peripheral retinal location having an eccentricity between −30 degrees and 30 degrees with respect to the optical axis,
wherein image quality at the peripheral retinal location is improved by reducing at least one optical aberration at the peripheral retinal location, the at least one optical aberration comprising peripheral defocus, and
wherein peripheral defocus for visual field angles between −30 degrees and 30 degrees with respect to the optical axis is less than about 1.0 Diopter when the optic is implanted in a normal human eye.
14. An intraocular lens (LOL) configured to improve vision for a patient's eye, the intraocular lens comprising:
an optic comprising:
an anterior aspheric surface having a first curvature and configured to receive ambient incident light; and
a posterior aspheric surface opposite the anterior aspheric surface and having a second curvature, the anterior aspheric surface and the posterior aspheric surface intersected by an optical axis, the second curvature configured to provide refractive optical power,
wherein the anterior aspheric surface is concave, and the posterior aspheric surface is convex,
wherein the optic comprises a meniscus lens having the anterior aspheric surface and posterior aspheric surface,
wherein the optic is configured to focus light incident along a direction parallel to the optical axis at the fovea to produce a functional foveal image,
wherein the optic is configured to focus light incident on the patient's eye at an oblique angle with respect to the optical axis at a peripheral retinal location disposed at a distance from the fovea, the peripheral retinal location having an eccentricity between −30 degrees and 30 degrees with respect to the optical axis,
wherein image quality at the peripheral retinal location is improved by reducing at least one optical aberration at the peripheral retinal location, the at least one optical aberration comprising a residual spherical aberration introduced by the optic, and
wherein the residual spherical aberration introduced by the optic is less than about 0.5 μm for visual field angles between −30 degrees and 30 degrees with respect to the optical axis.