Induced aperture lens and method
Disclosed are lenses and methods for verifying a lens with an induced aperture. The lenses can have a geometry that, among other things, maintains a centered position about a wearer's eye to prevent more than a permissible amount of movement of the lens relative to the eye. Further disclosed is a method for verifying the power profiles used with the lens, and a lens that can have a single power profile for a wide range of presbyopia.
1. An ophthalmic lens comprising:
an apex area having distance vision correcting power and a power distribution creating a blurred region outside of the apex area so as to cause an induced aperture;
a thickness profile having a center thickness of 100-120 microns, and a peripheral thickness of 220-310 microns at a chord diameter of 12.30 mm;
a base curve between 7.9 mm and 8.5 mm;
a lens diameter between 14.0 and 14.5 mm;
a power profile having an aperture inducing power rise between +2.00 to +2.75 diopters,
wherein the lens is made of polymacon, and
wherein the aperture inducing power rise is a front surface tangential power rise as determined at the 1.5 mm radius away from a center of the apex area.
2. The ophthalmic lens of claim 1 , wherein the base curve is between 8.1 mm and 8.3 mm.
3. The ophthalmic lens of claim 1 , wherein the lens diameter is between 14.3 mm to 14.5 mm.
4. An ophthalmic lens comprising:
an apex area having distance vision correcting power and a power distribution creating a blurred region outside of the apex area so as to cause an induced aperture;
a thickness profile having a center thickness of 100-120 microns, and a peripheral thickness of 220-310 microns at a chord diameter of 12.30 mm;
a base curve between 7.9 mm and 8.5 mm;
a lens diameter between 14.0 and 14.5 mm;
a power profile having an aperture inducing power rise between +2.375 to +3.125 diopters,
wherein the lens is made of etafilcon; and
wherein the aperture inducing power rise is a front surface tangential power rise as determined at the 1.5 mm radius away from a center of the apex area.
5. The ophthalmic lens of claim 4 , wherein a sag of the lens is between about 3.7 mm to 4.75 mm.
6. The ophthalmic lens of claim 5 , wherein the sag of the lens is between about 3.9 mm to 4.75 mm.
7. The ophthalmic lens of claim 6 , wherein the sag of the lens is between about 4.05 mm to 4.5 mm.
8. An ophthalmic lens comprising:
an apex area having distance vision correcting power and a power distribution creating a blurred region outside of the apex area so as to cause an induced aperture;
a thickness profile having a center thickness of 100-120 microns, and a peripheral thickness of 220-310 microns at a chord diameter of 12.30 mm;
a base curve between 7.9 mm and 8.5 mm;
a lens diameter between 14.0 and 14.5 mm;
a power profile having an aperture inducing power rise between +2.00 to +3.25 diopters,
wherein the lens is made of silicon hydrogel; and
wherein the aperture inducing power rise is a front surface tangential power rise as determined at the 1.5 mm radius away from a center of the apex area.
9. The ophthalmic lens of claim 8 , wherein an edge thickness is 145 microns as measured at 0.3 mm in from an edge of the lens.
10. The ophthalmic lens of claim 8 , further comprising a scotopic ring outside of the apex area and blurred region.
11. The ophthalmic lens of claim 10 , wherein the scotopic ring begins at least 3.0 mm away from a center of the apex area.
12. The ophthalmic lens of claim 1 , wherein a sag of the lens is between about 3.7 mm to 4.75 mm.
13. The ophthalmic lens of claim 12 , wherein the sag of the lens is between about 3.9 mm to 4.75 mm.
14. The ophthalmic lens of claim 13 , wherein the sag of the lens is between about 4.05 mm to 4.5 mm.
15. The ophthalmic lens of claim 1 , wherein an edge thickness is 145 microns as measured at 0.3 mm in from an edge of the lens.
16. The ophthalmic lens of claim 1 , further comprising a scotopic ring outside of the apex area and blurred region.
17. The ophthalmic lens of claim 16 , wherein the scotopic ring begins at least 3.0 mm away from a center of the apex area.
18. The ophthalmic lens of claim 4 , wherein the base curve is between 8.1 mm and 8.3 mm.
19. The ophthalmic lens of claim 4 , wherein the lens diameter is between 14.3 mm to 14.5 mm.
20. The ophthalmic lens of claim 4 , wherein an edge thickness is 145 microns as measured at 0.3 mm in from an edge of the lens.
21. The ophthalmic lens of claim 4 , further comprising a scotopic ring outside of the apex area and blurred region.
22. The ophthalmic lens of claim 21 , wherein the scotopic ring begins at least 3.0 mm away from a center of the apex area.
23. The ophthalmic lens of claim 8 , wherein the base curve is between 8.1 mm and 8.3 mm.
24. The ophthalmic lens of claim 8 , wherein the lens diameter is between 14.3 mm to 14.5 mm.
25. The ophthalmic lens of claim 8 , wherein a sag of the lens is between about 3.7 mm to 4.75 mm.
26. The ophthalmic lens of claim 25 , wherein the sag of the lens is between about 3.9 mm to 4.75 mm.
27. The ophthalmic lens of claim 26 , wherein the sag of the lens is between about 4.05 mm to 4.5 mm.