Multifocal lens design for preventing and/or slowing myopia progression
Contact lenses incorporate multifocal power profiles that at least one of slow, retard or preventing myopia progression. The lens includes a first zone at a center of the ophthalmic lens and at least one peripheral zone surrounding the first zone. The at least one peripheral zone has a different width and dioptric power than the first zone. The first zone and at least one peripheral zone are stepped or discontinuous. The multifocal power profile has substantially equivalent foveal vision correction to a single vision lens and has a depth of focus and reduced retinal image quality sensitivity that slows, retards, or prevents myopia progression.
1. An ophthalmic lens for at least one of slowing, retarding or preventing myopia progression, the ophthalmic lens comprising:
a central zone at a center of the ophthalmic lens; and
at least two peripheral zones surrounding the central zone, said at least two peripheral zones having different widths and dioptric powers than said central zone,
wherein the central zone and at least two peripheral zones are stepped or discontinuous, thereby providing a multifocal lens power profile having equivalent foveal vision correction to a single vision lens, and having a depth of focus and reduced retinal image quality sensitivity that slows, retards, or prevents myopia progression, wherein the power is equal to 0.26 D for a radial range of between 0 mm to less than 1.15 mm, equal to −0.32 D for a radial range of greater than or equal to 1.15 mm to less than 2.19 mm, and equal to −0.95 D for a radial range of greater than or equal to 2.19 mm to less than 3.43 mm.
2. The ophthalmic lens according to claim 1 , wherein the reduced retinal image quality sensitivity is in a range of +1.50 to −1.25 for accommodative states ranging from about 1 D to about 5 D.
3. The ophthalmic lens according to claim 1 , wherein the reduced retinal image quality sensitivity is in a range of +0.75 to −0.50 for accommodative states ranging from about 1 D to about 5 D.
4. The ophthalmic lens according to claim 1 , wherein the reduced retinal image quality sensitivity is in a range of +0.50 to −0.25 for accommodative states ranging from about 1 D to about 5 D.
5. The ophthalmic lens according to claim 1 , wherein the at least one peripheral zone comprises three zones.
6. The ophthalmic lens according to claim 1 , wherein the at least one peripheral zone comprises four zones.
7. The ophthalmic according to claim 1 , further comprising an outer zone having one or more stabilization mechanisms.
8. The ophthalmic lens according to claim 1 , wherein the ophthalmic lens comprises a contact lens.
9. The ophthalmic lens according to claim 1 , wherein the ophthalmic lens comprises a spectacle lens.
10. The ophthalmic lens according to claim 1 , wherein the ophthalmic lens comprises an intraocular lens, a corneal inlay, or a corneal onlay.