Contact lens with reduced spherical aberration for aphakic eyes

Claim 2

A contact lens for the aphakic eye, said lens having a rear substantially conicoidal surface of eccentricity E 2 , a front substantially ellipsoidal surface of eccentricity E 1 , a vertex thickness t, a power D and an index of refraction N 1 ', where E 2 =0.5200, E 1 =3.67695-4.82760(N 1 ')+2.64699(N 1 ') 2 -0.50402(N 1 ') 3 ±0.1000, R 2 =at least 7 mm, D ranges from 10.0 to 18.0, N 1 '=at most 1.6, Semidiameter of the optical surface is no more than 0.715 times the value of R 2 , whereby spherical aberration is controlled.

Claim 3

The contact lens of claim 1 wherein t=0.2 to 1.5 mm.

Claim 4

The contact lens of claim 1 wherein said front surface is prolate.

Claim 5

The contact lens of claim 1 wherein said rear surface is prolate.

Claim 6

The contact lens of claim 1 wherein said rear surface is substantially spherical.

Claim 7

The contact lens of claim 1 wherein said rear surface is substantially ellipsoidal.

Claim 8

A contact lens having a rear substantially conicoidal surface of eccentricity E 2 and radius of curvature R 2 , a front substantially ellipsoidal surface of eccentricity E 1 , a vertex thickness t, a power D, and an index of refraction N', where E.sub.1 =A+B(E.sub.2)+C(E.sub.2).sup.2 +D(E.sub.2).sup.3 ±0.1000, such that A=4.05867-5.08043(N 1 ')+2.56577(N 1 ') 2 -0.46169(N 1 ') 3 B=-0.16033+0.33874(N 1 ')-0.22903(N 1 ') 2 +0.04887(N 1 ') 3 C=-1.16275+0.41548(N 1 ')+0.57643(N 1 ') 2 -0.17671(N 1 ') 3 D=-1.26391+2.49760(N 1 ')-1.51226(N 1 ') 2 +0.26253(N 1 ') 3 , and R 2 =at least 7.0 mm, t ranges from 0.2 to 1.5 mm, D ranges from 12.5 to 15.5D, N 1 '=at most 1.6, E 2 ranges from 0.0000 to 0.8000, semi-diameter of the optical surface is no more than 0.715 times the value of R 2 , whereby spherical aberration is controlled.

Claim 9

A contact lens having a rear substantially conicoidal surface of eccentricity E 2 and radius of curvature R 2 , a front substantially ellipsoidal surface of eccentricity E 1 , a vertex thickness t, a power D, and an index of refraction N', where E.sub.1 =A+B(E.sub.2)+C(E.sub.2).sup.2 +D(E.sub.2).sup.3 ±0.1000, such that A=4.05867-5.08043(N 1 ')+2.56577(N 1 ') 2 -0.46169(N 1 ') 3 B=-0.16033+0.33874(N 1 ')-0.22903(N 1 ') 2 +0.04887(N 1 ') 3 C=-1.16275+0.41548(N 1 ')+0.57643(N 1 ') 2 -0.17671(N 1 ') 3 D=-1.26391+2.49760(N 1 ')-1.51226(N 1 ') 2 +0.26253(N 1 ') 3 , and R 2 =at least 7.0 mm, t ranges from 0.2 to 1.5 mm, D ranges from 12.5 to 15.5D, N 1 '=at most 1.6, E 2 ranges from 0.0000 to 0.8000, semi-diameter of the optical surface is no more than 0.715 times the value of R 2 , whereby spherical aberration is controlled.

Claim 10

The contact lens of claim 7 wherein R 2 =optimally approximately 7.6 mm.

Claim 11

The contact lens of claim 7 wherein t=optimally approximately 0.5 mm.

Claim 12

The contact lens of claim 7 wherein D=optimally approximately 14.

Claim 13

The contact lens of claim 7 wherein said front surface is prolate.

Claim 14

The contact lens of claim 7 wherein said rear surface is prolate.

Claim 15

The contact lens of claim 7 wherein said rear surface is substantially ellipsoidal.

Claim 16

The contact lens having a rear substantially conicoidal surface of eccentricity E 2 , a front substantially ellipsoidal surface of eccentricity E 1 adjusted, a power D, a vertex thickness t, and an index of refraction N 1 ', as follows: ##EQU4## where E.sub.1 =A+B(E.sub.2)+C(E.sub.2).sup.2 +D(E.sub.2).sup.3 ±0.1000, such that A=4.05867-5.08043(N 1 ')+2.56577(N 1 ') 2 -0.46169(N 1 ') 3 B=-0.16033 +0.33874(N 1 ')-0.22903(N 1 ') 2 +0.04887(N 1 ') 3 C=-1.16275+0.41548(N 1 ')+0.57643(N 1 ') 2 -0.17671(N 1 ') 3 D=-1.26391+2.49760(N 1 ')-1.51226(N 1 ') 2 +0.26253(N 1 ') 3 , and where Power Correction Factor=F+G(E 2 )+H(E 2 ) 2 +I(E 2 ) 3 , such that F=0.46824-0.88410(N 1 ')+0.55650(N 1 ') 2 -0.11750(N 1 ') 3 G=-2.56767+5.15201(N 1 ') -3.44146(N 1 ') 2 +0.6527(N 1 ') 3 H=6.72075-13.69854(N 1 ')9.27500 (N 1 ') 2 -2.08333(N 1 ') 3 I=-5.99791+12.09027(N 1 ')-8.10416(N 1 ') 2 +1.80555(N 1 ') 3 , and where R 2 =at least 7.0 mm, t ranges from 0.2 to 1.5 mm, D ranges from 10.0 to 18.0D, N 1 '=at most 1.6, E 2 ranges from 0.0000 to 0.8000, semi-diameter of the optical surface is no more than 0.715 times the value of R 2 , whereby spherical aberration is controlled.

Claim 17

The contact lens having a rear substantially conicoidal surface of eccentricity E 2 , a front substantially ellipsoidal surface of eccentricity E 1 adjusted, a power D, a vertex thickness t, and an index of refraction N 1 ', as follows: ##EQU4## where E.sub.1 =A+B(E.sub.2)+C(E.sub.2).sup.2 +D(E.sub.2).sup.3 ±0.1000, such that A=4.05867-5.08043(N 1 ')+2.56577(N 1 ') 2 -0.46169(N 1 ') 3 B=-0.16033 +0.33874(N 1 ')-0.22903(N 1 ') 2 +0.04887(N 1 ') 3 C=-1.16275+0.41548(N 1 ')+0.57643(N 1 ') 2 -0.17671(N 1 ') 3 D=-1.26391+2.49760(N 1 ')-1.51226(N 1 ') 2 +0.26253(N 1 ') 3 , and where Power Correction Factor=F+G(E 2 )+H(E 2 ) 2 +I(E 2 ) 3 , such that F=0.46824-0.88410(N 1 ')+0.55650(N 1 ') 2 -0.11750(N 1 ') 3 G=-2.56767+5.15201(N 1 ') -3.44146(N 1 ') 2 +0.6527(N 1 ') 3 H=6.72075-13.69854(N 1 ')9.27500 (N 1 ') 2 -2.08333(N 1 ') 3 I=-5.99791+12.09027(N 1 ')-8.10416(N 1 ') 2 +1.80555(N 1 ') 3 , and where R 2 =at least 7.0 mm, t ranges from 0.2 to 1.5 mm, D ranges from 10.0 to 18.0D, N 1 '=at most 1.6, E 2 ranges from 0.0000 to 0.8000, semi-diameter of the optical surface is no more than 0.715 times the value of R 2 , whereby spherical aberration is controlled.

Claim 18

The contact lens of claim 14 wherein R 2 =optimally approximately 7.6 mm.

Claim 19

The contact lens of claim 14 wherein t=optimally approximately 0.5 mm.

Claim 20

The contact lens of claim 14 wherein D=optimally approximately 14.

Claim 21

The contact lens of claim 14 wherein said front surface is prolate.

Claim 22

The contact lens of claim 14 wherein said rear surface is prolate.

Claim 23

The contact lens of claim 14 wherein said rear surface is substantially ellipsoidal.

Claim 24

A contact lens for the aphakic eye, said lens having a rear substantially conicoidal surface of eccentricity E 2 , a front substantially ellipsoidal surface of eccentricity E 1 , a vertex thickness t,a power D and an index of refraction N 1 ', where E 2 =0.5200, E 1 =3.67695-4.82760(N 1 ')+2.64699(N 1 ') 2 -0.50402(N 1 ') 3 R 2 32 at least 7.0 mm, D ranges from 10.0 to 18.0, N 1 '=at most 1.7, and semi-diameter of the optical surface is no more than 0.715 times the value of R 2 , whereby spherical aberration is almost completely eliminated.

Claim 25

A contact lens for the aphakic eye, said lens having a rear substantially conicoidal surface of eccentricity E 2 , a front substantially ellipsoidal surface of eccentricity E 1 , a vertex thickness t,a power D and an index of refraction N 1 ', where E 2 =0.5200, E 1 =3.67695-4.82760(N 1 ')+2.64699(N 1 ') 2 -0.50402(N 1 ') 3 R 2 32 at least 7.0 mm, D ranges from 10.0 to 18.0, N 1 '=at most 1.7, and semi-diameter of the optical surface is no more than 0.715 times the value of R 2 , whereby spherical aberration is almost completely eliminated.

Claim 26

The contact lens of claim 21 wherein t=0.2 to 1.5 mm.

Claim 27

The contact lens of claim 21 wherein said front surface is prolate.

Claim 28

The contact lens of claim 21 wherein said rear surface is prolate.

Claim 29

The contact lens of claim 21 wherein said rear surface is substantially ellipsoidal.

Claim 30

A contact lens having a rear substantially conicoidal surface of eccentricity E 2 and radius of curvature R 2 , a front substantially ellipsoidal surface of eccentricity E 1 , a vertex thickness t, a power D, and an index of refraction N 1 ', where E.sub.1 =A+B(E.sub.2)+C(E.sub.2).sup.2 +D(E.sub.2).sup.3 such that A=4.05867-5.08043(N 1 ')+2.56577(N 1 ') 2 -0.46169(N 1 ') 3 B=-0.16033+0.33874(N 1 ')-0.22903(N 1 ) 2 +0.04887(N 1 ') 3 C=-1.16275+0.41548(N 1 ')+0.57643(N 1 ') 2 -0.17671(N 1 ') 3 D =-1.26391+2.49760(N 1 ')-1.51226(N 1 ') 2 +0.26253(N 1 ') 3 , and R 2 =at least 7.0 mm, t ranges from 0.2 to 1.5 mm, D ranges from 12.5 to 15.5D, N 1 '=at most 1.7, E 2 ranges from 0.0000 to 0.8000, and semi-diameter of the optical surface is no more than 0.715 times the value of R 2 , whereby spherical aberration is almost completely eliminated.

Claim 31

A contact lens having a rear substantially conicoidal surface of eccentricity E 2 and radius of curvature R 2 , a front substantially ellipsoidal surface of eccentricity E 1 , a vertex thickness t, a power D, and an index of refraction N 1 ', where E.sub.1 =A+B(E.sub.2)+C(E.sub.2).sup.2 +D(E.sub.2).sup.3 such that A=4.05867-5.08043(N 1 ')+2.56577(N 1 ') 2 -0.46169(N 1 ') 3 B=-0.16033+0.33874(N 1 ')-0.22903(N 1 ) 2 +0.04887(N 1 ') 3 C=-1.16275+0.41548(N 1 ')+0.57643(N 1 ') 2 -0.17671(N 1 ') 3 D =-1.26391+2.49760(N 1 ')-1.51226(N 1 ') 2 +0.26253(N 1 ') 3 , and R 2 =at least 7.0 mm, t ranges from 0.2 to 1.5 mm, D ranges from 12.5 to 15.5D, N 1 '=at most 1.7, E 2 ranges from 0.0000 to 0.8000, and semi-diameter of the optical surface is no more than 0.715 times the value of R 2 , whereby spherical aberration is almost completely eliminated.

Claim 32

The contact lens of claim 26 wherein R 2 =optimally approximately 7.6 mm.

Claim 33

The contact lens of claim 26 wherein t=optimally approximately 0.5 mm.

Claim 34

The contact lens of claim 26 wherein D=optimally approximately 14.

Claim 35

The contact lens of claim 26 wherein said front surface is prolate.

Claim 36

The contact lens of claim 26 wherein said rear surface is prolate.

Claim 37

The contact lens of claim 26 wherein said rear surface is substantially ellipsoidal.

Claim 38

The contact lens having a rear substantially conicoidal surface of eccentricity E 2 , a front substantially ellipsoidal surface of eccentricity E 1 (adjusted), a power D, a vertex thickness t and an index of refraction N 1 ', as follows: ##EQU5## where E.sub.1 =A+B(E.sub.2)+C(E.sub.2).sup.2 D(e.sub.2).sup.3 such that A=4.05867-5.08043(N 1 ')+2.56577(N 1 ') 2 -0.46169(N 1 ') 3 B=-0.16033+0.33874(N 1 ')-0.22903(N 1 ') 2 +0.04887(N 1 ') 3 C=-1.16275+0.41548(N 1 ')+0.57643(N 1 ') 2 -0.17671(N 1 ') 3 D=-1.26391+2.49760(N 1 ')-1.51226(N 1 ') 2 +0.26253(N 1 ') 3 , and where Power Correction Factor=F+G(E 2 )+H(E 2 ) 2 ×I(E 2 ) 3 , such that F=0.46824-0.88410(N 1 ')+0.55650 (N 1 ') 2 -0.11750(N 1 ') 3 G=-2.56767+5.15201(N 1 ')-3.44146(N 1 ') 2 +0.76527(N 1 ') 3 H=6.72075-13.69854(N 1 ')+9.27500(N 1 ') 2 -2.08333N 1 ') 3 I=-5.99791+12.09027(N 1 ')-8.10416(N 1 ') 2 +1.80555(N 1 ') 3 . and where R 2 =at least 7.0 mm, t ranges from 0.2 to 1.5 mm, E 2 ranges from 0.0000 to 0.8000, D ranges from 10.0 to 18.0D, N 1 '=at most 1.7, and semi-diameter of the optical surface is no more than 0.715 times the value of R 2 , whereby spherical aberration is almost completely eliminated.

Claim 39

The contact lens having a rear substantially conicoidal surface of eccentricity E 2 , a front substantially ellipsoidal surface of eccentricity E 1 (adjusted), a power D, a vertex thickness t and an index of refraction N 1 ', as follows: ##EQU5## where E.sub.1 =A+B(E.sub.2)+C(E.sub.2).sup.2 D(e.sub.2).sup.3 such that A=4.05867-5.08043(N 1 ')+2.56577(N 1 ') 2 -0.46169(N 1 ') 3 B=-0.16033+0.33874(N 1 ')-0.22903(N 1 ') 2 +0.04887(N 1 ') 3 C=-1.16275+0.41548(N 1 ')+0.57643(N 1 ') 2 -0.17671(N 1 ') 3 D=-1.26391+2.49760(N 1 ')-1.51226(N 1 ') 2 +0.26253(N 1 ') 3 , and where Power Correction Factor=F+G(E 2 )+H(E 2 ) 2 ×I(E 2 ) 3 , such that F=0.46824-0.88410(N 1 ')+0.55650 (N 1 ') 2 -0.11750(N 1 ') 3 G=-2.56767+5.15201(N 1 ')-3.44146(N 1 ') 2 +0.76527(N 1 ') 3 H=6.72075-13.69854(N 1 ')+9.27500(N 1 ') 2 -2.08333N 1 ') 3 I=-5.99791+12.09027(N 1 ')-8.10416(N 1 ') 2 +1.80555(N 1 ') 3 . and where R 2 =at least 7.0 mm, t ranges from 0.2 to 1.5 mm, E 2 ranges from 0.0000 to 0.8000, D ranges from 10.0 to 18.0D, N 1 '=at most 1.7, and semi-diameter of the optical surface is no more than 0.715 times the value of R 2 , whereby spherical aberration is almost completely eliminated.

Claim 40

The contact lens of claim 33 wherein R 2 =optimally approximately 7.6 mm.

Claim 41

The contact lens of claim 33 wherein t=optimally approximately 0.5 mm.

Claim 42

The contact lens of claim 33 wherein D=optimally approximately 14.

Claim 43

The contact lens of claim 33 wherein said front surface is prolate.

Claim 44

The contact lens of claim 33 wherein said rear surface is prolate.

Claim 45

The contact lens of claim 33 wherein said rear surface is substantially ellipsoidal.