# US 11,221,501 B2 · Using binocular rivalry for expanding color perception

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- Number: US 11,221,501 B2
- Document ID: US11221501B2
- Status: Granted
- Kind: B2
- Application number: 16/494,919
- Filed: 2018-03-16
- Published: 2020-01-09
- Granted: 2022-01-11
- Earliest claimed: 2017-03-17
- Assignees: WaveShift LLC
- Applicants: Waveshift LLC
- Inventors: Thomas W. Chalberg, Jr.
- Web page: https://patentgrep.com/patent/US11221501B2

## CPC

- G02C 7/104: {having spectral characteristics for purposes other than sun-protection}
- G02B 1/043: {Contact lenses}
- G02B 5/22: Absorbing filters {(G02B5/201 - G02B5/208 take precedence)}
- G02C 7/04: Contact lenses for the eyes (disinfection or sterilisation of contact lenses A61L12/00)
- G02C 2202/16: Laminated or compound lenses
- G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

Ophthalmic lenses including a spectral filters (e.g., a reflective or absorptive spectral filter) are disclosed. A first of the spectral filters substantially blocks light in a first portion of a spectral sensitivity range of a cone (e.g., S, M, or L cone) and substantially passes light in a second, non-overlapping portion of the spectral sensitivity range. A second spectral filter substantially blocks light in the second portion of the spectral sensitivity range and substantially passes light in the first spectral sensitivity range.

## Claims

### Claim 1

An article, comprising:
a first ophthalmic lens comprising a first spectral filter; and
a second ophthalmic lens comprising a second spectral filter,
wherein the first spectral filter substantially blocks visible light having wavelengths corresponding to a first portion of a spectral sensitivity range of a first type of cone and substantially passes visible light having wavelengths in a second, non-overlapping portion of the spectral sensitivity range, and
the second spectral filter substantially blocks visible light having wavelengths in the second portion of the spectral sensitivity range and substantially passes visible light having wavelengths in the first spectral sensitivity range,
wherein at least the first ophthalmic lens further comprises a filter array comprising the first spectral filter.

### Claim 2 (depends on 1)

The article of claim 1, wherein the article is eyeglasses, a pair of contact lenses, goggles, or a pair of intraocular lenses.

### Claim 3 (depends on 1)

The article of claim 1, wherein the first and second spectral filters are a low-pass filter and a high-pass filter, respectively.

### Claim 4 (depends on 1)

The article of claim 1, wherein at least one of the first and second spectral filters is a notch filter.

### Claim 5 (depends on 1)

The article of claim 1, wherein at least one of the first and second spectral filters substantially transmits visible light having wavelengths below 520 nm.

### Claim 6 (depends on 5)

The article of claim 5, wherein both of the first and second spectral filters substantially transmits visible light having wavelengths below 520 nm.

### Claim 7 (depends on 1)

The article of claim 1, wherein the first and second spectral filters are reflective spectral filters.

### Claim 8 (depends on 1)

The article of claim 1, wherein the first and second spectral filters are absorptive spectral filters.

### Claim 9 (depends on 1)

The article of claim 1, wherein the first and second spectral filters are passive spectral filters.

### Claim 10 (depends on 1)

The article of claim 1, wherein the first and second spectral filters are dynamic spectral filters.

### Claim 11 (depends on 10)

The article of claim 10, wherein the dynamic spectral filters each comprise an electro-optic element.

### Claim 12 (depends on 1)

The article of claim 1, wherein the second ophthalmic lens further comprises a filter array comprises the second spectral filter.

### Claim 13 (depends on 1)

The article of claim 1, wherein a first transmission spectrum of the first spectral filter and a second transmission spectrum of the second spectral filter are configured to enhance the color perception of a dichromat.

### Claim 14 (depends on 1)

A method of enhancing the color perception of a dichromat, comprising:
providing the dichromat with the article of claim 1.

### Claim 15 (depends on 14)

The method of claim 14, wherein the dichromat is a protanope and the first type of cone corresponds to an M-cone.

### Claim 16 (depends on 14)

The method of claim 14, wherein the dichromat is a deuteranope and the first type of cone is an L-cone.

### Claim 17 (depends on 14)

The method of claim 14, wherein the dichromat is a tritanope and the first type of cone is a S-cone.