Multifocal lens design and method for preventing and/or slowing myopia progression

Abstract

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.

What is claimed is: 
     
         1 . A method for at least one of slowing, retarding or preventing myopia progression by:
 providing an ophthalmic lens with a multifocal power profile having substantially 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, said power profile comprising a first zone at a center of a lens, and at least one peripheral zone surrounding the first zone, said at least one peripheral zone having a different width and dioptric power than said first zone, wherein the first zone and at least one peripheral zone are stepped or discontinuous, and wherein the power profile is equal to 0.26 D for a radial range 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; and altering the growth of the eye.   
     
     
         2 . The method according to claim  15 , wherein the reduced retinal image quality sensitivity is in a range of +1.50 to −1.25 for accommodative states ranging from about 1D to about 5D. 
     
     
         3 . The method according to claim  15 , wherein the reduced retinal image quality sensitivity is in a range of +0.75 to −0.50 for accommodative states ranging from about 1D to about 5D. 
     
     
         4 . The method according to claim  15 , wherein the reduced retinal image quality sensitivity is in a range of +0.50 to −0.25 for accommodative states ranging from about 1D to about 5D. 
     
     
         5 . The method according to claim  15 , wherein the at least one peripheral zone comprises two zones. 
     
     
         6 . The method according to claim  15 , wherein the at least one peripheral zone comprises three zones. 
     
     
         7 . The method according to claim  15 , wherein the at least one peripheral zone comprises four zones. 
     
     
         8 . The method according to claim  15 , wherein the multifocal lens power profile is adjustable based on pupil size to achieve a balance between foveal vision correction and an effective depth of focus and reduced retinal image quality sensitivity for treating myopia progression. 
     
     
         9 . The method according to claim  15 , wherein the ophthalmic lens comprises a contact lens. 
     
     
         10 . The method according to claim  15 , wherein the ophthalmic lens comprises a spectacle lens. 
     
     
         11 . The method according to claim  15 , wherein the ophthalmic lens comprises an intraocular lens, a corneal inlay, or a corneal onlay. 
     
     
         12 . The method according to claim  15 , further comprising adding one or more stabilization zones into an outer zone.