Intraocular lenses provided with angled edges to prevent posterior capsular opacification
First Claim
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1. Intraocular lens for implantation within an eye generally perpendicular to the optical axis of the eye, comprising:
- an anterior surface (34);
a posterior surface (64);
an external peripheral edge 36 between said anterior and posterior surfaces defining an optical portion 34 with at least one portion of said external peripheral edge 36 and of said anterior surface forming an obtuse angle and at least one portion of said external peripheral edge 36 and of said posterior surface forming an acute angle;
two or more haptic elements 38 of the same transverse trapezoidal or rhomboidal cross section permanently connected to said external peripheral edge 36; and
acute external posterior haptic edges 52 on said haptic elements 38.
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Abstract
An intraoluclar refractive lens comprises an optic portion (34) with an outer peripheral edge (36) and one or more, preferably two, three or four equidistant haptic elements (38). Each haptic element (38) has the same shape, with a trapezoid or rhomboid cross-section. The edge of the outer rear surface of each haptic element (38) and the edge of the rear optic element are shaped like acute angles to prevent posterior capsular opacification.
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Citations
19 Claims
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1. Intraocular lens for implantation within an eye generally perpendicular to the optical axis of the eye, comprising:
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an anterior surface (34);
a posterior surface (64);
an external peripheral edge 36 between said anterior and posterior surfaces defining an optical portion 34 with at least one portion of said external peripheral edge 36 and of said anterior surface forming an obtuse angle and at least one portion of said external peripheral edge 36 and of said posterior surface forming an acute angle;
two or more haptic elements 38 of the same transverse trapezoidal or rhomboidal cross section permanently connected to said external peripheral edge 36; and
acute external posterior haptic edges 52 on said haptic elements 38. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19)
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2. Intraocular lens for implantation in a crystalline lens capsule generally perpendicular to the optical axis of the eye to prevent posterior capsular opacification, comprising:
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an anterior surface (34);
a posterior surface (64);
an external peripheral edge 36 between said anterior surface (34) and said posterior surface (64) defining an optical portion 34 with at least one portion of said external peripheral edge 36 and of said posterior surface forming an acute angle;
two or more haptic elements 38 of the same transverse trapezoidal or rhomboidal cross section permanently connected to said external peripheral edge 36; and
acute external posterior haptic edges 52 on said haptic elements 38.
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14. Intraocular lens to be implanted within an eye, in the posterior chamber of said eye, perpendicular to the optical axis of said eye, comprising:
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an anterior surface;
a posterior surface;
an external peripheral edge 36 between said anterior surface and said posterior surface defining an optical portion 34 with at least one portion of said external peripheral edge 36 and of said posterior surface forming an acute angle;
two or more haptic elements 38 of the same transverse trapezoidal or rhomboidal cross section permanently connected to said external peripheral edge 36; and
acute external posterior haptic edges 52 on said haptic elements 38.
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Specification