Ophthalmic lenses utilizing binary amplitude modulation
An ophthalmic lens for myopia control comprising patterns or masks which block and/or attenuate light (e.g., by amplitude modulation). The amplitude modulation may be binary, for example, where zero amplitude means absorption or blocking of light and a value of one means that light may be transmitted through the lens without change (e.g., without significant change). Alternatively, in some embodiments, the amplitude modulation may not be binary.
1 . An ophthalmic lens comprising:
at least one pattern or mask which blocks and/or attenuates light by amplitude modulation;
wherein the amplitude modulation is at least one of binary or non-binary; and
wherein a modulation transfer function (MTF) of the lens over a fixed portion or over an amplitude modulating shape is reduced by 10% or more or 20% or more or 30% or more.
2 . The ophthalmic lens of claim 1 , wherein the amplitude modulation has multiple steps wherein zero amplitude means absorption or blocking of light and a value of one means that light may be transmitted through the lens without change and a value between zero and one means only a portion of the light is attenuated or blocked.
3 . The ophthalmic lens of claim 1 , wherein the amplitude modulation has 2, 3, 4, 5, 6, 7, 8, 9, or 10 steps.
4 . The ophthalmic lens of claim 1 , wherein the amplitude modulation is continuous between zero and one.
5 . The ophthalmic lens of claim 1 , wherein the ophthalmic lens is one of a spectacle lens, a contact lens, a corneal onlay or inlay, an intraocular lens or a combination thereof.
6 . The ophthalmic lens of claim 1 , wherein the ophthalmic lens is part of an ophthalmic lens system.
7 . The ophthalmic lens of claim 1 , wherein the at least one pattern or mask is symmetrical.
8 . The ophthalmic lens of claim 1 , wherein the at least one pattern or mask is asymmetrical.
9 . The ophthalmic lens of claim 1 , wherein the at least one pattern or mask is localized to one or more regions of the lens.
10 . The ophthalmic lens of claim 1 , wherein the at least one pattern or mask is composed of shapes, concentric rings, in a form of a grid, in the form of a circular distribution, in the form of a hexagonal array, in the form of a spiral array, in the form of a rectangular array, in the form of a linear array, in the form of a non-linear array, and/or any other random or predetermined pattern.
11 . The ophthalmic lens of claim 1 , wherein the at least one pattern or mask forms a transmission that is uniform or not uniform.
12 . The ophthalmic lens of claim 1 , wherein the at least one pattern or mask is incorporated into a plurality of spaced apart shapes that are distributed over at least a portion of the lens.
13 . The ophthalmic lens of claim 1 , wherein one or more amplitude modulation elements are implemented across at least one of the entire lens or located within certain regions of a lens.
14 . The ophthalmic lens of claim 1 , wherein the ophthalmic lens is implemented within only certain portions of a diameter of an overall lens system.
15 . The ophthalmic lens of claim 1 , wherein the lens has a clear center zone.
16 . The ophthalmic lens of claim 1 , wherein the center zone contains amplitude modulation patterns.
17 . The ophthalmic lens of claim 1 , wherein a plurality of the amplitude modulation elements are distributed across the lens.
18 . An ophthalmic lens comprising:
at least one pattern or mask which blocks and/or attenuates light by amplitude modulation;
wherein the amplitude modulation is at least one of binary or non-binary; and
wherein an MTF is selectively reduced by 10% or more or 20% or more or 30% or more at low (<6 cycles/degree), medium (6-10 cycles/degree) or high (>10 cycles/degree) spatial frequencies or across one or more spatial frequencies in a uniform manner or selectively attenuated or boosted for one or more spatial frequencies.
19 . An ophthalmic lens comprising:
at least one pattern or mask which blocks and/or attenuates light by amplitude modulation;
wherein the amplitude modulation is at least one of binary or non-binary; and
wherein a plurality of amplitude modulation elements are patterned in an array or randomly distributed.