Methods of obtaining ophthalmic lenses providing the eye with reduced aberrations

A method of selecting an intraocular lens that is capable of reducing aberrations of the eye after its implantation comprising the steps of:

• (i) characterizing at least one corneal surface as a mathematical model;
• (ii) calculating the resulting aberrations of said corneal surface(s) by employing said mathematical model;
• (iii) selecting an intraocular lens having a suitable optical power from a plurality of lenses having the same power, but different aberrations;
• (iv) determining if an optical system comprising said selected lens and corneal model sufficiently reduces the aberrations.

A method of designing an ophthalmic lens suitable for implantation into the eye, characterized by the steps of:

• selecting a representative group of patients;
• collecting corneal topographic data for each subject in the group;
• transferring said data to terms representing the corneal surface shape of each subject for a preset aperture size;
• calculating a mean value of at least one corneal surface shape term of said group, so as to obtain at least one mean corneal surface shape term and/or calculating a mean value of at least one to the cornea corresponding corneal wavefront aberration term, each corneal wavefront aberration term being obtained by transformation through corneal surface shape terms;
• from said at least one mean corneal surface shape term or from said at least one mean corneal wavefront aberration term designing an ophthalmic lens capable of reducing said at least one mean wavefront aberration term of the optical system comprising cornea and lens.

A method of designing an intraocular lens capable of reducing aberrations of the eye after its implantation, comprising:

• (i) characterizing at least one corneal surface as a mathematical model in terms of a conoid of rotation;
• (ii) calculating the resulting aberrations of said corneal surface(s) by employing said mathematical model;
• (iii) selecting the optical power of the intraocular lens;
• and
• (iv) modeling an intraocular lens such that a wavefront arriving from an optical system comprising said lens and corneal model obtains reduced aberrations.

A method of designing an intraocular lens capable of reducing aberrations of the eye after its implantation, comprising:

• (i) characterizing at least one corneal surface as a mathematical model;
• (ii) calculating the resulting aberrations of said corneal surface(s) by employing said mathematical model;
• (iii) selecting the optical power of the intraocular lens;
• and
• (iv) modeling an intraocular lens such that a wavefront arriving from an optical system comprising said lens and corneal model obtains reduced aberrations,
• wherein modeling the intraocular lens includes selecting the anterior radius and surface of the lens, the posterior radius and surface of the lens, lens thickness and refractive index of the lens, and wherein the aspheric component of the anterior surface is selected while the model lens has predetermined central radii, lens thickness and refractive index.

A method of designing an intraocular lens capable of reducing aberrations of the eye after its implantation, comprising:

• (i) characterizing at least one corneal surface as a mathematical model, including characterizing front and rear corneal surfaces of an individual by means of topographical measurements;
• (ii) calculating the resulting aberrations of said corneal surface(s) by employing said mathematical model and expressing the total corneal aberrations as a combination of polynomials;
• (iii) selecting the optical power of the intraocular lens;
• and
• (iv) modeling an intraocular lens such that a wavefront arriving from an optical system comprising said lens and corneal model obtains reduced aberrations.

A method of designing an intraocular lens capable of reducing aberrations of the eye after its implantation, comprising:

• (i) characterizing corneal surfaces of a selected population as a mathematical model;
• (ii) calculating the resulting aberrations of said corneal surface(s) by employing said mathematical model and expressing average corneal aberrations of said population as a combination of polynomials;
• (iii) selecting the optical power of the intraocular lens;
• and
• (iv) modeling an intraocular lens such that a wavefront arriving from an optical system comprising said lens and corneal model obtains reduced aberrations.

A method of designing an intraocular lens capable of reducing aberrations of the eye after its implantation, comprising:

• (i) characterizing at least one corneal surface as a mathematical model;
• (ii) calculating the resulting aberrations of said corneal surface(s) by employing said mathematical model;
• (iii) selecting the optical power of the intraocular lens;
• (iv) modeling an intraocular lens such that a wavefront arriving from an optical system comprising said lens and corneal model obtains reduced aberrations;
• (v) calculating the aberrations resulting from an optical system comprising said modeled intraocular lens and cornea;
• and
• (vi) determining if the modeled intraocular lens has provided sufficient reduction in aberrations;
• and optionally remodeling the intraocular lens until a sufficient reduction is obtained.

A method of designing an intraocular lens capable of reducing aberrations of the eye after its implantation, comprising:

• (i) characterizing at least one corneal surface as a mathematical model in terms of Seidel or Zernike polynomials;
• (ii) calculating the resulting aberrations of said corneal surface(s) by employing said mathematical model;
• (iii) selecting the optical power of the intraocular lens;
• and
• (iv) modeling an intraocular lens such that a wavefront arriving from an optical system comprising said lens and corneal model obtains reduced aberrations.

A method of designing an intraocular lens capable of reducing aberrations of the eye after its implantation, comprising:

• (i) characterizing corneal surfaces of a selected population and expressing each cornea as a linear combination of polynomials;
• (ii) comparing polynomial coefficients between individual corneas;
• (iii) selecting one nominal coefficient value from an individual cornea;
• and
• (iv) modeling a lens such that a wavefront arriving from an optical system comprising said lens and individual cornea sufficiently reduces said nominal coefficient value.