Method for producing a lens and a lens produced thereby
View Patent ↗In a method for producing a lens, in particular a spectacle lens, central aberrations of an eye, to be corrected, of an ametropic person, such as sphere, cylinder and axis, are compensated. At least one refracting surface of the lens is configured such that for at least one direction of view both a dioptric correction of the ametropia is performed and aberrations of higher order are corrected. Their effects on the visual acuity and/or the contrast viewing are a function of the size of the pupillary aperture of the eye to be corrected and are corrected by the lens.
1. A method for producing a lens, comprising:
providing a lens to correct aberrations of an eye of an ametropic person; and
modifying a surface of the lens to correct aberrations of lower order, wherein the modifying further corrects a percentage of at least one aberration of higher order; and
wherein the modifying comprises providing at least one refracting surface of the lens that performs dioptric correction of the ametropia and performs correction of the at least one aberration of the higher order for at least one direction of view, and wherein the percentage of the at least one aberration of higher order is compensated by correcting only central aberrations.
2. The method as claimed in claim 1 further comprising another modifying of at least a portion of the same surface of the lens to increase the percentage of correction of the at least one aberration of higher order.
3. The method as claimed in claim 1 , wherein a spherical aberration is corrected as the at least one aberration of higher order.
4. The method as claimed in claim 1 , wherein a coma is corrected as the at least one aberration of higher order.
5. The method as claimed in claim 1 , wherein a trefoil aberration is corrected as the at least one aberration of higher order.
6. The method as claimed in claim 1 , wherein values required for correcting at least one of the lower and higher aberrations are determined by measuring visual acuity by implementing at least one of the following methods: by determining refraction; by measuring a wavefront; and by skiaskopy.
7. The method as claimed in claim 6 , wherein said wavefront is measured with a Hartmann-Shack sensor.
8. The method as claimed in claim 1 , wherein a size of a pupillary aperture of the eye is determined for correcting said aberrations, in particular said aberrations of higher order.
9. The method as claimed in claim 1 , wherein at least 50% of the at least one aberration of higher order is compensated solely by a correction of said aberrations of lower order such as sphere, cylinder and axis.
10. The method as claimed in claim 1 , wherein at least 85% of the at least one aberration of higher order is compensated solely by a correction of said aberrations of lower order comprising at least one of: sphere, cylinder and axis.
11. The method as claimed in claim 1 , wherein a region of highest visual acuity is formed by introducing at least one aspheric surface.
12. The method as claimed in claim 1 , wherein a region of highest visual acuity is formed by introducing at least one atoric surface.
13. The method as claimed in claim 1 , wherein a region of highest visual acuity is formed by introducing at least one free form surface.
14. The method as claimed in claim 1 , wherein a region in said lens is corrected for an infinite object distance.
15. The method as claimed in claim 1 , wherein a region in said lens is corrected for a finite object distance.
16. The method as claimed in claim 1 , wherein a transition of a region with highest visual acuity into a region with slightly reduced visual acuity is performed via an edge.
17. The method as claimed in claim 1 , wherein the dioptric correction occurs in the same method step as the correction of the at least one aberration of the higher order.
18. The method as claimed in claim 1 , wherein at least 75% of the at least one aberration of higher order is compensated solely by a correction of said aberrations of lower order such as sphere, cylinder and axis.
19. A method for producing a lens, comprising:
providing a spectacle lens wherein central aberrations of an eye to be corrected of an ametropic person, such as sphere, cylinder and axis, are compensated, wherein at least one refracting surface of said lens is configured in a way that for at least one direction of view, both a dioptric correction of the ametropia is performed and aberrations of higher order whose effects on the visual acuity and/or contrast viewing are a function of a size of a pupillary aperture of said eye to be corrected, are corrected by said lens; and
wherein at least 50% of said aberrations of higher order are compensated solely by a correction of said central aberrations such as sphere, cylinder and axis.
20. The method as claimed in claim 19 , wherein at least 85% of said aberrations of higher order are compensated solely by a correction of said central aberrations comprising at least one of: sphere, cylinder and axis.
21. The method as claimed in claim 19 , wherein the size of the pupillary aperture of the eye is determined for correcting said aberrations, in particular said aberrations of higher order.
22. The method as claimed in claim 19 , wherein at least 75% of said aberrations of higher order are compensated solely by a correction of said central aberrations such as sphere, cylinder and axis.