OPHTHALMIC LENSES FOR REDUCING MYOPIC PROGRESSION AND METHODS OF MAKING THE SAME
A method includes providing an ophthalmic lens having a prescribed optical power, the ophthalmic lens having a surface having a base curvature corresponding to the prescribed optical power, and exposing a material at the surface to laser radiation sufficient to locally reshape the material to form a plurality of lenslets on the surface. The lenslets each have a corresponding optical power that differs from the prescribed optical power of the ophthalmic lens.
1 . A device, comprising:
an ophthalmic lens having a prescribed optical power, the ophthalmic lens being composed of a lens material and having a surface having a base curvature corresponding to the prescribed optical power;
one or more optical elements formed in or supported by the surface, each optical element providing an optical effect different from the prescribed optical power; and
one or more layers of material different from the lens material and coated on the surface, the one or more layers of material comprising a layer of a first material, each optical element being located at a discontinuity in the layer of the first material.
2 . The device of claim 1 , wherein at least some of the optical elements are myopic defocus lenslets.
3 . The device of claim 1 , wherein at least some of the optical elements are scattering centers.
4 . The device of claim 1 , wherein the optical elements comprise both myopic defocus lenslets and scattering centers.
5 . The device of claim 4 , wherein the myopic defocus lenses and scattering centers occupy mutually exclusive areas of the surface.
6 . The device of claim 4 , wherein at least some of the myopic defocus lenses and scattering centers occupy a common area of the surface.
7 . The device of claim 1 , wherein the one or more layers of the first material comprise a hardcoat layer.
8 . The device of claim 1 , wherein the one or more layers of the first material comprise an antireflection layer.
9 . The device of claim 1 , wherein the one or more optical elements are formed in the surface of the lens.
10 . The device of claim 1 , wherein the one or more optical elements form a non-regular array.
11 . A method, comprising:
exposing discrete locations on a surface of an ophthalmic lens to laser radiation sufficient to form pits in the surface of the ophthalmic lens at those locations; and
depositing a first material in the pits in the surface of the ophthalmic lens to provide light scattering centers or lenslets in the lens.
12 . The method of claim 11 , wherein providing the light scattering centers or lenslets further comprises removing residual first material on the lens surface outside of the pits.
13 . The method of claim 11 , wherein the first material is deposited after the discrete locations are exposed.
14 . The method of claim 11 , wherein the exposure and deposition are synchronized so deposition commences before exposure is complete.
15 . The method of claim 14 , wherein exposure and deposition sequentially form and then deposit material in each pit before forming a subsequent pit.
16 . The method of claim 14 , wherein the synchronized exposure and deposition are performed by simultaneously moving relative to the lens surface a laser and print nozzle that are fixed relative to each other.
17 . The method of claim 11 , wherein the deposition involves depositing discrete volumes of the first material in the pits.
18 . The method of claim 11 , wherein the discrete locations on the surface of the ophthalmic lens form a non-regular array.
19 . The method of claim 11 , wherein exposing the discrete locations on the surface of the ophthalmic lens to the laser radiation sufficient to form the pits comprises:
generating, by a laser, a laser beam; and
redirecting, by a beam directing assembly, the laser beam toward the surface of the lens.
20 . The method of claim 11 , wherein exposing the discrete locations on the surface of the ophthalmic lens to the laser radiation sufficient to form the pits comprises vaporizing a portion of the ophthalmic lens.