Accommodating intraocular lens and lens series and method of lens selection

Claim 1

An intraocular lens for the correction of the axial refractive error and the accommodative insufficiency of the post-surgical aphakic eye, made of homogeneous transparent optical material, for placement in the posterior chamber of the human aphakic eye, of continuously and regularly increasing refractive power peripheralward, of a diameter between 4.5 mm and 7 mm and of thickness between 0.65 mm and 1 mm, with at least one surface of said intraocular lens a positive aspheric surface of revolution having an apical umbilical point at which the derivative of curvature vanishes, said surface increasing continuously and regularly in curvature and refractive power from said apical umbilical point to its periphery and where the magnitude and shape of said surface is defined mathematically by means of the following expression: y=(Ax+Bx.sup.2).sup.1/2 +Cx.sup.(p) +Dx.sup.(q) +Ex.sup.(z), where A=2r apex , B=(e 2 -1), e being the eccentricity at the apex of said surface, where C, D, and E are integral or non-integral coefficients of x.sup.(p), x.sup.(q), and x.sup.(z) respectively, and where p, q, and z can be integral or non-integral exponents of x, and where r ranges from 5 mm to 150 mm, where e ranges from 0.0 to 4.0, where at least one of the values of C, D, and E is other than zero, values of C, D, and E ranging from 0.0 to ±9, the values of p, q, and z range from a value of 0.5 to 6.0.

Claim 16

A method of selection and obtaining of an appropriate intraocular lens from a given lens series of at least 525 lenses of a given front and back surface design relation, wherein each lens is designed to correct both the axial refractive error and the deficiency of accommodation of an aphakic eye having a given apical radius of curvature r of the front surface of the cornea, and a given length l, of the eye as measured along its geometrical axis from the apex of said corneal surface to the internal limiting membrane of the retina, said method consisting in the utilization of the r and l values in the selection and supply of lenses corresponding to said r and l parameters by the supplier who obtains the appropriate lens from an inventory of at least said 525 lenses, the lens delivered to the doctor being designated by the same r and l values supplied by the doctor and being designed specifically to correct the axial refractive error and the deficiency of accommodation for an eye having said r and l values.

Claim 17

A method of selection and obtaining of an appropriate intraocular lens from a given lens series of at least 525 lenses of a given front and back surface design relation, wherein each lens is designed to correct both the axial refractive error and the deficiency of accommodation of an aphakic eye having a given apical radius of curvature r of the front surface of the cornea, and a given length l, of the eye as measured along its geometrical axis from the apex of said corneal surface to the internal limiting membrane of the retina, said method consisting in the utilization of the r and l values in the selection and supply of lenses corresponding to said r and l parameters by the supplier who obtains the appropriate lens from an inventory of at least said 525 lenses, the lens delivered to the doctor being designated by the same r and l values supplied by the doctor and being designed specifically to correct the axial refractive error and the deficiency of accommodation for an eye having said r and l values.