IMPLANTABLE OPHTHALMIC DEVICES WITH CIRCULARLY ASYMMETRIC OPTIC AND METHODS
First Claim
1. An implantable ophthalmic device comprising:
- an optic having an optical axis, the optic having a surface that is perpendicular to the optical axis and bounded by a perimeter that lacks circular symmetry.
3 Assignments
0 Petitions
Accused Products
Abstract
Astigmatism is an optical aberration that displaces the eye'"'"'s vertical focal plane with respect to its horizontal focal plane. This displacement in focal planes, which may be caused by an irregularly shaped cornea and/or crystalline lens, causes images to appear blurry. Astigmatism can be corrected by implanting an optic, such as section of a spherical lens, whose projection onto a plane perpendicular to the optical axis is noncircular (e.g., rectangular or elliptical). Because the optic is noncircular, it provides more optical power along one axis than along another axis. As a result, it introduces an astigmatism that can be used to offset or compensate the eye'"'"'s corneal and/or lenticular astigmatism when aligned properly with respect to the principal meridians of the cornea and/or crystalline lens.
44 Citations
29 Claims
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1. An implantable ophthalmic device comprising:
an optic having an optical axis, the optic having a surface that is perpendicular to the optical axis and bounded by a perimeter that lacks circular symmetry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An implantable ophthalmic device comprising:
an electro-active cell configured to form a noncircular aperture, in a plane normal to the optical axis, whose major axis is aligned with respect to a principal meridian of an astigmatic eye. - View Dependent Claims (20, 21, 22)
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23. A method of correcting astigmatism, the method comprising:
actuating an electro-active cell implanted in an astigmatic eye to form a noncircular aperture, in a plane normal to the optical axis, whose major axis is aligned with respect to a principal meridian of an astigmatic eye. - View Dependent Claims (24, 25, 26, 28, 29)
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27. A method of implanting an optic in an eye, the optic having a surface that is perpendicular to the optical axis of the eye and bounded by a perimeter that lacks circular symmetry, the method comprising:
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(a) making a mark on the scelera of the eye indicative of an astigmatic characteristic of the eye; (b) inserting the optic into the eye; and (c) aligning the perimeter of the optic with respect to the mark on the scelera.
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Specification