Accommodating intraocular lens
View Patent ↗An intraocular lens for implantation in a capsular bag of an eye includes an optic disposed about an optical axis and a haptic including a protruding portion disposed inside the optic. The optic has an anterior face and an opposing posterior face that are configured to provide a lens power. In response to an ocular force of the eye, the haptic transmits a force that alters one or more of a shape of the optic and an axial thickness of the optic. The protruding portion of the haptic has a refractive index that is equal to a refraction index of the optic for at least one wavelength within the visible spectrum.
1. An intraocular lens for implantation in a capsular bag of an eye, comprising:
an optic disposed about an optical axis having an axial thickness through the center thereof, an anterior face, and an opposing posterior face, the faces configured to provide a lens power; and
a haptic including a protruding portion disposed inside the optic such that a straight line parallel to the optical axis passes through, in order, the anterior surface, the protruding portion, and the posterior surface;
wherein, in response to an ocular force, the haptic transmits a force that alters one or more of a shape of the optic and the axial thickness of the optic;
wherein the protruding portion of the haptic has a refractive index that is equal to a refraction index of the optic for at least one wavelength within the visible spectrum.
2. The intraocular lens of claim 1 , wherein the haptic protrudes through an edge of the optic.
3. The intraocular lens of claim 1 , wherein the intraocular lens has an accommodative power change of 2.94 Diopters in response to an ocular force.
4. The intraocular lens of claim 1 , wherein the intraocular lens has an accommodative power change of about 3 Diopters in response to an ocular force.
5. The intraocular lens of claim 1 , wherein the haptic portion has a maximum axial thickness that is at least one half the axial thickness of the optic.
6. The intraocular lens of claim 1 , wherein the optic has a stiffness less than 500 kPa.
7. The intraocular lens of claim 1 , wherein the optic has a stiffness between 25 kPa and 200 kPa.
8. The intraocular lens of claim 1 , wherein the haptic includes a plurality of radial segments that are shaped to engage an equatorial region of the capsular bag.
9. The intraocular lens of claim 1 , wherein the total number of haptics is greater than two.
10. The intraocular lens of claim 1 , wherein haptic comprises a plurality of arms, each arm having a proximal portion protruding into the optic and a distal portion outside the optic, the proximal portions being joined together by a ring structure.
11. The intraocular lens of claim 1 , wherein haptic comprises a plurality of arms, each arm having a proximal portion protruding into the optic and a distal portion outside the optic, the distal portions being joined together by a ring structure.
12. The intraocular lens of claim 1 , wherein the ocular force is 10 grams of force.
13. The intraocular lens of claim 1 , wherein a dispersion function for the protruding portion of the haptic and a dispersion function for the optic have the same value at one wavelength of light between 400 nm and 700 nm.
14. The intraocular lens of claim 1 , wherein a dispersion function for the protruding portion of the haptic and a dispersion function for the optic have the same value at more than one wavelength of light between 400 nm and 700 nm.
15. The intraocular lens of claim 1 , wherein the haptic includes a portion protruding into the optic extending from a region around a circumference of the optic and into a clear aperture of the optic.
16. The intraocular lens of claim 1 , wherein the haptic comprises at least two materials having different stiffnesses.