Methods of obtaining ophthalmic lenses providing the eye with reduced aberrations
An intraocular lens comprises optical part configured to be implanted in an eye of a subject. The intraocular lens further comprises at least one aspheric surface configured, in combination with a lens in the capsular bag of an eye, to reduce an aberration of a wavefront passing the eye. The aberrations may include astigmatism, coma, and/or spherical aberrations. An aberration of the intraocular lens may be expressed as a linear combination of Zernike polynomial terms that may include a Zernike coefficient a 11 . The Zernike coefficient a 11 may be selected to reduce a spherical aberration of a wavefront passing the eye and/or to compensate for an average value resulting from a predetermined number of estimations of the Zernike coefficient a 11 in a population of corneas and capsular bag lenses.
1 . An intraocular lens, comprising:
an optical part configured to be implanted in an eye of a subject; and
at least one aspheric surface configured, in combination with a lens in the capsular bag of an eye, to reduce an aberration of a wavefront passing the eye.
2 . The intraocular lens of claim 1 , wherein the aberration includes at least on of astigmatism, coma, and spherical aberration.
3 . The intraocular lens of claim 1 , wherein the at least one aspheric surface is configured to reduce a predetermined aberration coefficient below a predetermined borderline value.
4 . The intraocular lens of claim 1 , wherein an aberration of the intraocular lens is expressed as a linear combination of Zernike polynomial terms.
5 . The intraocular lens of claim 4 , wherein the linear combination of Zernike polynomial terms includes a Zernike coefficient a 11
6 . The intraocular lens of claim 5 , wherein the Zernike coefficient a 11 is selected to reduce a spherical aberration of a wavefront passing the eye.
7 . The intraocular lens of claim 5 , wherein the Zernike coefficient a 11 is selected so as to compensate for an average value resulting from a predetermined number of estimations of the Zernike coefficient a 11 in a population of corneas and capsular bag lenses.
8 . The intraocular lens of claim 5 , wherein the Zernike coefficient a 11 is selected so as to compensate for the individual corneal and capsular bag lens coefficient of the subject.
9 . The intraocular lens of claim 1 , wherein the at least one aspheric surface is configured to reduce at least one Zernike coefficient of a selected population.
10 . The intraocular lens of claim 1 , wherein the intraocular lens is characterized by one or more parameters which contribute to a determination of a lens shape of the optical part.
11 . The intraocular lens of claim 11 , wherein at least one of the one or more parameters is selected to deviate sufficiently from a spherical lens so as to compensate for the aberration.
12 . An intraocular lens, comprising:
an optical part configured to be implanted between the cornea and the capsular bag; and
at least one aspheric surface configured to compensate for an aberration of a wavefront passing the eye.
13 . The intraocular lens of claim 12 , wherein the optical part configured to be implanted in the anterior chamber of the eye.
14 . The intraocular lens of claim 12 , wherein the optical part configured to be implanted in the posterior chamber of the eye.
15 . An intraocular lens, comprising:
a correction lens configured to be implanted in an eye of a subject, the eye comprising a cornea and a capsular bag lens which together are characterized by at least one wavefront Zernike coefficient;
the correction lens configured, in combination with cornea and the capsular bag lens, to provide a predetermined reduction in the at least one wavefront Zernike coefficient.
16 . The intraocular lens of claim 15 , wherein the at least one wavefront Zernike coefficient is at least one of a spherical aberration term and an astigmatism term.
17 . The intraocular lens of claim 15 , wherein the at least one wavefront Zernike coefficient is an 11th wavefront Zernike coefficient.
18 . An intraocular lens, comprising:
an optical part configured to be implanted in an eye of a subject; and
at least one aspheric surface configured, together with a lens in the capsular bag of the eye, to restore a wavefront passing the eye and deviating from sphericity into a more spherical wavefront.