A dual optical accommodating foldable intraocular lens

6854933580_2c8b688306_z

Pseudoaccommodation is a complex phenomenon that can be attributed to several static (i.e., pupil size, against-the-rule cylindrical refractive error, multifocality of the cornea) and dynamic (i.e., anterior movement of the implant itself) factors.

In order to achieve that goal, dual-optic accommodating Intraocular Lenses have been designed, whose anterior optic displaces axially to increase ocular power, and focus near objects.

Multifocality and monovision can be established in several ways, surgical or nonsurgical.

Nonsurgical ways are with properly designed spectacles and contact lenses.

The anterior translation member capable of moving an optic of the anterior viewing element relative to an optic of the posterior viewing along an optical axis of the lens such that the anterior optic and the posterior optic are positioned further apart when the anterior optic is in the accommodated position than when the anterior optic is in the unaccommodated position. An accommodating intraocular lens for implantation in an eye having an optical axis, said lens comprising:an anterior viewing element comprised of an optic having refractive power;a first anterior translation member connected to said anterior viewing element at first and second attachment locations;a posterior viewing element comprised of an optic having refractive power;a first posterior translation member connected to said posterior viewing element at third and fourth attachment locations, said first anterior translation member and said first posterior translation member connected at a first apex such that all of said first, second, third and fourth attachment locations are interconnected to one another through said anterior translation member and said posterior translation member;said anterior viewing element optic being mounted to move relative to said posterior viewing element optic along the optical axis between an accommodated position and an unaccommodated position in response to action of the ciliary muscle of the eye, said relative movement corresponding to change in the combined refractive power of the optics of at least one diopter;wherein said lens is configured such that, when said lens is implanted in the eye, said posterior viewing element optic is substantially stationary with respect to a location on said optical axis during movement of said anterior viewing element optic;wherein said anterior viewing element optic and said posterior viewing element optic are positioned further apart when said anterior viewing element optic is in the accommodated position than when said anterior viewing element optic is in the unaccommodated position, and said anterior viewing element optic is biased toward said accommodated position. The lens of Claim 1, wherein said optics are mounted to move relative to each other along the optical axis in response to a contractile force by the ciliary muscle of the eye upon the capsular bag of the eye of up to 2.0 grams. The lens of Claim 1 or 2, wherein:at least one of said viewing element optics is a biconvex optic; said biconvex optic has first and second surfaces; said first surface has a radius of curvature of about 5.944 mm; and said second surface has a radius of curvature of about 5.944 mm. The lens of Claim 1 or 2, wherein:at least one of said viewing element optics is a biconvex optic; said biconvex optic has first and second surfaces; said first surface has a radius of curvature of about 5.656 mm; and said second surface has a radius of curvature of about 7.788 mm. The lens of Claim 1 or 2, wherein:at least one of said viewing element optics is a biconvex optic; said biconvex optic has first and second surfaces; said first surface has a radius of curvature of about 6.961 mm; and said second surface has a radius of curvature of about 8.5 mm. The lens of Claim 1 or 2, wherein:at least one of said viewing element optics is a biconcave optic; said biconcave optic has first and second surfaces; said first surface has a radius of curvature of about 18.765 mm; and said second surface has a radius of curvature of about 18.765 mm. The lens of Claim 1 or 2, wherein:at least one of said viewing element optics is a concave-convex optic;said concave-convex optic has anterior and posterior surfaces;said concave-convex optic has a refractive power of -8 diopter;said anterior surface has a radius of curvature of about 9 mm to about 9.534 mm; and said posterior surface has a radius of curvature of about 40 mm. The lens of Claim 1 or 2, wherein:at least one of said viewing element optics is a concave-convex optic;said concave-convex optic has anterior and posterior surfaces;said concave-convex optic has a refractive power of -5 diopter;said anterior surface has a radius of curvature of about 9 mm to about 9.534 mm; and said posterior surface has a radius of curvature of about 20 mm. The lens of any one of Claims 1 to 20, wherein said relative movement of said optics includes an accommodated position and an unaccommodated position, said optics being about 0.5 to about 4 millimeters closer together when in the unaccommodated position. The lens of any one of Claims 1 to 20, wherein said relative movement of said optics includes an accommodated position and an unaccommodated position, said optics being about 1 to about 3 millimeters closer together when in the unaccommodated position, 23.

The lens of any one of Claims 1 to 20, wherein said relative movement of said optics includes an accommodated position and an unaccommodated position, said optics being about 1 to about 2 millimeters closer together when in the unaccommodated position. The lens of any one of Claims 1 to 20, wherein said relative movement of said optics includes an accommodated position and an unaccommodated position, said optics being about 1.5 millimeters closer together when in the unaccommodated position. The lens of any one of Claims 1 to 20, wherein:said lens has a thickness between an anterior face of the anterior viewing element and a posterior face of the posterior viewing element;said relative movement of said optics includes an accommodated position and an unaccommodated position; and said thickness decreases from about 3.0 to about 4.0 millimeters in the accommodated position to about 1.5 to about 2.5 millimeters in the unaccommodated position. The lens of Claim 23, wherein:said lens has a thickness between an anterior face of the anterior viewing element and a posterior face of the posterior viewing element;said relative movement of said optics includes an accommodated position and an unaccommodated position; and said thickness decreases from about 3.0 to about 4.0 millimeters in the accommodated position to about 1.5 to about 2.5 millimeters in the unaccommodated position. The lens of Claim 24, wherein:said lens has a thickness between an anterior face of the anterior viewing element and a posterior face of the posterior viewing element;said relative movement of said optics includes an accommodated position and an unaccommodated position; and said thickness decreases from about 3.0 to about 4.0 millimeters in the accommodated position to about 1.5 to about 2.5 millimeters in the unaccommodated position. The lens of any one of Claims 1 to 27, further comprising:an anterior biasing element comprising first and second anterior translation members extending from the anterior viewing element;a posterior biasing element comprising first and second posterior translation members extending from the posterior viewing element;a first anterior abutment connected to said first anterior translation member remote from said anterior viewing element;a second anterior abutment connected to said second anterior translation member remote from said anterior viewing element;a first posterior abutment connected to said first posterior translation member remote from said anterior viewing element; a second posterior abutment connected to said second posterior translation member remote from said posterior viewing element;wherein said first anterior abutment and said first posterior abutment are in abutting relation and said second anterior abutment and said second posterior abutment are in abutting relation. The lens of Claim 28, wherein:said first anterior abutment further comprises first anterior engagement members;said first posterior abutment further comprises first posterior engagement members; and the first anterior engagement members and the first posterior engagement members match so as to the facilitate alignment and assembly of said first anterior abutment and said first posterior abutment. The lens of any one of Claims 1 to 31, wherein:said lens further comprises a second anterior translation member connected to said anterior viewing element, and a second posterior translation member connected to said posterior viewing element; and said second anterior translation member and said second posterior translation member meet at a second apex.

Visiogen Inc, Irvine, CA, ETATS-UNISAim: To design an accommodating intraocular lens with extended accommodative range that can be adapted to current standard phacoemulsification and endocapsular implantation technique.

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