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US 6,616,693 B1Granted
Flexible fixation members for angle-supported anterior chamber intraocular lenses
AssigneeAdvanced Medical Optics, Inc.
InventorRobert T. Nguyen
Life of this patent
Estimating the term…
Abstract
An intraocular lens having an optic and a plurality of fixation members coupled to the optic. The fixation members are adapted to flex about points located closer to the outer edge of the IOL than to the optic. The fixation members may have a converging width intermediate region projecting outward from the optic and a pair of leg portions extending generally perpendicularly thereto. The leg portions include foot members and flex radially inward with respect to the intermediate region. Because the optic and intermediate regions are relatively stable, the leg portions flex inward but the optic does not vault or bow upon a compressive fit within the surrounding eye.
Claims20
A foldable intraocular lens (IOL) for implantation in an anterior chamber of an eye, the IOL comprising:
- an optic centered on an optical axis, the IOL defining a planar or domed surface that is substantially perpendicular with respect to the optical axis at least at its intersection with the optical axis;
- and
- at least one fixation member having a proximal end secured to the optic, an intermediate region extending generally radially outwardly from the proximal end and a distal region secured to an outer portion of the intermediate region, the intermediate region having a circumferential width (relative to the optical axis) that is at least twice as large as its axial thickness at all points, the distal region including at least one leg portion extending away from the outer portion of the intermediate region generally perpendicularly with respect to a radial line (relative to the optical axis) through the intermediate region, the leg portion able to flex in a direction parallel to the planar or domed surface of the IOL while the intermediate region being substantially unable to flex in a direction parallel to the planar or domed surface of the IOL.
A foldable intraocular lens (IOL) for implantation in an anterior chamber of an eye, the IOL comprising:
- an optic centered on an optical axis, the IOL defining a planar or domed surface that is substantially perpendicular with respect to the optical axis at least at its intersection with the optical axis;
- and
- at least one fixation member having a proximal end secured to the optic, an intermediate region extending generally radially outwardly from the proximal end, and a distal region secured to an outer portion of the intermediate region, the intermediate region having a circumferential width about the optical axis which is substantially smaller adjacent the outer portion than it is adjacent the proximal end, the distal region including at least one leg portion extending away from the outer portion of the intermediate region generally perpendicularly with respect to a radial line (relative to the optical axis) through the intermediate region, the leg portion being able to flex in a direction parallel to the planar or domed surface of the IOL while the intermediate region is substantially unable to flex in a direction parallel to the planar or domed surface of the IOL.
A foldable intraocular lens (IOL) for implantation in an anterior chamber of an eye, the IOL comprising:
- an optic centered on an optical axis, the IOL defining a planar or domed surface that is substantially perpendicular with respect to the optical axis at least at its intersection with the optical axis;
- and
- at least one fixation member exhibiting an angular transition so as to be stepped from the plane of the IOL, the fixation member having a proximal end secured to the optic, an intermediate region extending generally radially outwardly from the proximal end, and a distal region secured to an outer portion of the intermediate region, the distal region including at least one leg portion extending away from the outer portion of the intermediate region generally perpendicularly with respect to a radial line (relative to the optical axis) through the intermediate region, the leg portion being able to flex in a direction parallel to the planar or domed surface of the IOL while the intermediate region is substantially unable to flex in a direction parallel to the planar or domed surface of the IOL.
A foldable intraocular lens (IOL) having reduced optic vaulting for implantation in an anterior chamber of an eye, the IOL comprising:
- an optic centered on an optical axis, the IOL defining a planar or domed surface that is substantially perpendicular with respect to the optical axis at least at its intersection with the optical axis;
- and
- at least one fixation member having a proximal end secured to the optic, an intermediate region extending generally radially outwardly from the proximal end and a distal region secured to an outer portion of the intermediate region, the distal region being able to flex in a direction parallel to the planar or domed surface of the IOL, and the intermediate region having a circumferential width about the optical axis which is substantially smaller adjacent the outer portion than it is adjacent the proximal end.
A foldable intraocular lens (IOL) for implantation in an anterior chamber of an eye, the IOL comprising:
- an optic centered on an optical axis, the IOL defining a planar or domed surface that is substantially perpendicular with respect to the optical axis at least at its intersection with the optical axis;
- and
- at least one fixation member having a proximal end secured to the optic, an intermediate region extending generally radially outwardly from the proximal end, and a distal region secured to an outer portion of the intermediate region, the distal region including two leg portions extending away from the outer portion of the intermediate region generally perpendicularly with respect to a radial line (relative to the optical axis) through the intermediate region and away from each other in substantially opposite directions, wherein the two leg portions extend away from each other a distance equal to or less than a diameter of the optic to facilitate folding of the IOL.
A foldable intraocular lens (IOL) for implantation in an anterior chamber of an eye, the IOL comprising:
- an optic centered on an optical axis and having a peripheral edge, the IOL defining a planar or domed surface that is substantially perpendicular with respect to the optical axis at least at its intersection with the optical axis;
- and
- at least one fixation member for supporting the optic in the anterior chamber, the fixation member including
- an intermediate region having a length extending from the peripheral edge of the optic to an outer edge and having uniform axial thickness throughout the length, and
- at least one leg portion joined to the intermediate region at the outer edge and extending generally perpendicularly with respect to a radial line (relative to the optical axis) through the intermediate region, the leg portion being structured to flex in a direction parallel to the planar or domed surface of the IOL while the intermediate region is structured to be substantially unable to flex in a direction parallel to the planar or domed surface of the IOL.
2 more elements
Dependencies are inferred from the claim text.