Ophthalmic lenses for prevention of myopia progression
The invention provides ophthalmic lenses useful in preventing myopia progression. The lenses of the invention provide substantially constant distance vision power zone in the center of the optic zone surrounded by a zone that provides positive longitudinal spherical aberration.
1. An ophthalmic lens, comprising an optic zone comprising a central zone having substantially constant distance vision rower and at least a first annular zone concentric with the central zone and intentionally having positive longitudinal spherical aberration in an amount sufficient for the prevention or retardation of myopia progression wherein a second annular zone comprises progressively decreasing power in the direction towards the periphery of the lens.
2. The ophthalmic lens of claim 1 , wherein the distance vision power is overcorrected by about 0.25 to about 1.00 diopters.
3. A contact lens, comprising an optic zone comprising a central zone having substantially constant distance vision power; at least a first annular zone concentric with the central zone and intentionally having positive longitudinal spherical aberration in an amount sufficient for the prevention or retardation of myopia progression, wherein the distance vision power is overcorrected by about 0.25 to about 1.00 diopters and a second annular zone concentric with the first annular zone.
4. The contact lens of claim 3 , wherein the second annular zone comprises substantially constant power.
5. The contact lens of claim 3 , wherein the second annular zone comprises progressively decreasing power in the direction towards the periphery of the lens.
6. An ophthalmic lens, comprising an optic zone having a substantially constant distance vision power at the centermost portion of the optic zone and at least a first peripheral region to the distance vision power intentionally having positive longitudinal spherical aberration in an amount sufficient for the prevention or retardation of myopia progression wherein the distance vision power is overcorrected by about 0.25 to about 1.00 diopters.
7. The ophthalmic lens of claim 6 , further comprising a second peripheral region wherein the second peripheral region comprises progressively decreasing power in the direction towards the periphery of the lens.