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US 12,710,668 B2Granted
Ophthalmic lenses utilizing binary amplitude modulation
AssigneeBrien Holden Vision Institute Limited
InventorsArthur Back, Ravi Chandra Bakaraju
Life of this patent
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Abstract
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.
Claims19
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.
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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.
1 more element
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.
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Dependencies are inferred from the claim text.