Intraocular lens having an asymmetric hinged closed-loop haptic structure
An ophthalmic device includes an optic having an optic axis and a closed-loop haptic structure coupled with the optic. The closed loop haptic structure includes a first hinge having a first section, a second section, and a connecting section extending between the first section and the second section. The first section has a first component extending in a first angular direction and a second component extending in a second angular direction that is opposite to the first angular direction. The closed loop haptic structure further includes a second hinge including a radial section and an axial section extending from the axial section in the first angular direction, the radial section having a cross-sectional area greater than a maximum cross-sectional area of the first hinge.
1. An intraocular lens (IOL) comprising:
an optic including an optic axis; and
a first closed loop haptic coupled with the optic, the first closed loop haptic having a first end and a second end, wherein each of the first end and the second end are coupled to the optic, the first closed loop haptic comprising:
a first hinge coupling the first end of the first closed loop haptic to the optic, the first hinge including a first section, a second section, and a connecting section extending between the first section and the second section, wherein at least a portion of the first section extends in a first angular direction and at least a portion of the second section extends in a second angular direction that is opposite to the first angular direction, and
a second hinge coupling the second end of the first closed loop haptic to the optic, the second hinge including a radial section and an axial section extending from the radial section in the first angular direction, the radial section having a cross-sectional area greater than a maximum cross-sectional area of the first hinge,
wherein a portion of the first closed loop haptic formed by the second section of the first hinge and the axial section of the second hinge subtends an angle of at least 120 degrees.
2. The intraocular lens of claim 1 , wherein the first section, the second section, and the connecting section each have substantially the same cross-sectional area.
3. The intraocular lens of claim 1 wherein the first section has a first width and the radial section has a second width greater than the first width.
4. The intraocular lens of claim 3 wherein the first section has a first thickness and the second section has a second thickness substantially the same as the first thickness.
5. The intraocular lens of claim 3 wherein the second width is at least 1.5 multiplied by the first width.
6. The intraocular lens of claim 5 wherein the second width is at least twice the first width.
7. The intraocular lens of claim 5 wherein the second width is at least thrice the first width.
8. The intraocular lens of claim 1 , further comprising a second closed loop haptic coupled to the optic.
9. The intraocular lens of claim 8 , wherein the second closed loop haptic comprises:
a third hinge coupling a first end of the second closed loop haptic to the optic; and
a fourth hinge coupling a second end of the second closed loop haptic to the optic.
10. The intraocular lens of claim 8 , wherein the second closed loop haptic subtends a second angle of at least 90 degrees.