Contact lens comprising non-coaxial 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 sized and shaped to be placed against an eye of a patient;
an optic zone including primary base sphere distance correction zones and a plurality of individual lenslets with add power of at least +10 diopters and each having a diameter of between 0.45 and 1 mm and interspersed between and adjacent to the primary base sphere distance correction zones, the optic zone comprises a central region having a diameter of less than 2 mm that is clear of lenslets and surrounding region having lenslets, wherein in said surrounding region the plurality of lenslets with add power occupy between 20 and 60 percent of the surrounding region, the primary base sphere distance correction zones create a wavefront that focuses at a single point along a primary optical axis of the lens and on the retina and the plurality of lenslets with add power create non-coaxial wave-fronts that focus on a single point in front of the retina at a location not on the primary optical axis, and wherein a center of said non-coaxial wave-fronts are directed away from the fovea, the combination of lenslets and primary distance correction zones being arranged within the optic zone to provide clear vision and myopic defocus to all regions of the retina with the ratio of the total area of the primary base sphere distance correction zones to the lenslets ranges between 20 to 60 and 60 to 20; and
a peripheral zone surrounding the optic zone.
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 create myopic blur around the fovea of a patient.
4. The contact lens according to claim 1 , wherein the plurality of lenslets with add power are formed on the front convex surface.
5. The contact lens according to claim 1 , wherein the plurality of lenslets with add power are formed on the back concave surface.
6. The contact lens according to claim 1 , wherein the contact lens is a single vision spherical lens.
7. The contact lens according to claim 1 , wherein the contact lens is a toric lens.
8. The contact lens according to claim 1 , wherein the contact lens is soft contact lens.
9. The contact lens according to claim 1 , wherein the plurality of lenslets with add power are spherical.
10. The contact lens according to claim 1 , wherein the plurality of lenslets with add power are aspherical.
11. The contact lens according to claim 1 , wherein the plurality of lenslets with add power are toric.