Ophthalmic lens comprising lenslets for preventing and/or slowing myopia progression
Contact lenses incorporating an array of non-coaxial lenslets with add power that create non-coaxial myopic defocus within the optic zone of the lens may be utilized to prevent and/or slow myopia progression. The positive, non-coaxial lenslets cover about twenty to eighty percent of the central pupil area to deliver positive foci of light in front of the retina to slow the rate of myopia progression.
1. A contact lens for at least one of slowing, retarding or preventing myopia progression, the contact lens comprising:
a front convex surface;
a back concave surface; and an optic zone including primary base sphere distance correction zones and a plurality of lenslets each with +10 diopters or greater add power and each having a diameter of between 0.45 mm and 1 mm interspersed between and adjacent to the primary base sphere distance correction zones, wherein the plurality of lenslets with add power occupy between 40 to 60 percent of the optic zone, the primary base sphere correction zones create a wave-front that focuses at a single point along a primary optical axis of the ophthalmic lens and on the retina of an eye, and the plurality of lenslets with add power create non-coaxial wave-fronts that focus in front of the retina each along their own optical axis that is different from the primary optical axis and that is directed away from a fovea of said patient, the combination of lenslets and primary distance correction zones being arranged to provide clear vision to all regions of the retina, and myopic defocus from said lenslet wave-fronts form a ring pattern around the fovea.
2. The contact lens according to claim 1 , wherein the plurality of lenslets provide add power in the range of +10.00 to +30.00 diopters.
3. The contact lens according to claim 1 , wherein the plurality of lenslets with add power are configured to direct light across a primary optical axis of the lens.
4. The contact lens according to claim 1 , wherein the plurality of lenslets with add power are configured to direct light to one side of a primary optical axis of the lens.
5. The contact lens according to claim 1 , wherein the plurality of lenslets with add power are configured to direct light symmetrically away from the fovea of a patient.
6. The contact lens according to claim 1 , wherein the plurality of lenslets with add power are configured to direct light asymmetrically away from the fovea of a patient.
7. The contact lens according to claim 1 , wherein the plurality of lenslets with add power are configured to create myopic blur around the fovea of a patient.
8. The contact lens according to claim 1 , wherein the plurality of lenslets with add power are formed on the front convex surface.
9. The contact lens according to claim 1 , wherein the plurality of lenslets with add power are formed on the back concave surface.