WO1992012451A1 - Contact lens for correction of color blindness - Google Patents
Contact lens for correction of color blindness Download PDFInfo
- Publication number
- WO1992012451A1 WO1992012451A1 PCT/US1991/000020 US9100020W WO9212451A1 WO 1992012451 A1 WO1992012451 A1 WO 1992012451A1 US 9100020 W US9100020 W US 9100020W WO 9212451 A1 WO9212451 A1 WO 9212451A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lens
- red
- soft
- clear
- corneal contact
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/104—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses having spectral characteristics for purposes other than sun-protection
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/18—Block or graft polymers
- C08G64/183—Block or graft polymers containing polyether sequences
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/04—Contact lenses for the eyes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0008—Foam properties flexible
Definitions
- This invention relates to the use of corneal contact lenses for the correction of color blindness , in particular, soft or gas-permeable lenses .
- One object of the present invention is to provide a soft or gas-permeable contact lens containing red coloration which can be used for the correction of color blindness and which is relatively simple to manufacture .
- This invention comprises generally a central red zone in an otherwise clear contact lens .
- a thin layer of red coloration is placed on the center of the external surface of a clear corneal contact lens .
- This invention is applicable to hard, soft and gas-permeable contact lenses.
- the central red coloration is in line with the axis of the pupil and is preferably of a diameter such as to cover light entering the pupil, the remainder of the lens being clear.
- the coloration may be applied by painting, silk screening, stamping, or imprinting.
- Light having a wave length of below about 6000 A is substantially all absorbed.
- the red zone of the lens has transmissions of at least 60% of light of a wave length above about 6000 A.
- a lens made in accordance with this invention typically has a lens thickness in the order of 0.15 mm.
- the size of the lens depends somewhat on the size of the eye to be fitted and is in the range of 11-15 mm., the average diameter of the cornea of an eye being 12 mm. However, many individuals have diameters which are larger or smaller and eyelid openings which are larger or smaller. Similarly the average radius of a cornea is between 42 and 44 diopters but many corneas are steeper and flatter. Proper positioning of the lens of the present invention on a cornea is dependent on these factors as well as weight.
- FIG. 1 is a diagrammatic section of an eye with a lens of this invention in position on the cornea of the eye.
- Fig. 2 is a side view of the lens alone.
- Fig. 3 is a front view of the lens alone.
- the lens 15 is seated on the cornea 11 of the eye 10 so that the external central red-colored area 16 covers the light entering the eye through the cornea 11, anterior chamber 12, pupil of the iris 14, and eye lens 13.
- Invention Example 1 A clear soft corneal contact lens having a diameter of 14.5 mm. was coated on its spherical external center with a thin layer of red dye solution on an area having a diameter of 6mm. The colored area which is at the corneal apex is in the axis of the pupil of the eye. The application of the thin red layer was limited to the center area and the rest of the lens was left clear.
- the particular dye used was Passaic Color and Chemical Co. "Oil Red 2144" which is insoluble in water but soluble in aromatic hydrocarbon. Transmission of light through the red spot was substantially all above 6000 A with very little transmission below.
- Example 2 A clear gas-permeable contact lens having a diameter of 14.5 mm. was coated on its exterior center in the manner specified in Example 1. Transmission of light through the red spot was similar to that in Example 1. Upon clinical tests, I found that a thin red layer of this sort which covered the pupil was sufficient to provide a similar increase in color discrimination as when the entire lens was red colored.
- the soft and gas -permeable lenses o f this invention are not only more comfortable to wear, but can be worn for much longer periods of time than a hard lens .
- the colored area is much smaller there is a marked reduction in the color an observer notes in the eye.
- the lens can be made sufficiently large to enable ready and stable centration, without jeopardizing oxygen-transmission.
Abstract
A corneal contact lens (15) for the correction of color blindness, which is clear except for a thin red exterior layer (16) covering the area admitting light to the pupil (14).
Description
CONTACT LENS FOR CORRECTION OF COLOR BLINDNESS Background of Invention
This invention relates to the use of corneal contact lenses for the correction of color blindness , in particular, soft or gas-permeable lenses .
U. S . Patents 3 , 586 , 423 and 3 , 701, 590 and Canadian Patent 921 , 298 ( 1973 ) describe red-colored contact lenses which can be used to correct color blindness . In particular lenses illustrated in these patents and those made commercially under those patents are colored throughout with a red coloration . Whereas such coloration throughout the lens is satisfactory for so- called hard lenses made from plastic , it has been difficult to fashion a soft lens or a gas-permeable lens wherein the color remains uniformly distributed throughout the lens.
One object of the present invention is to provide a soft or gas-permeable contact lens containing red coloration which can be used for the correction of color blindness and which is relatively simple to manufacture .
Other objects and advantages of this invention will be apparent from the description and claims which follow taken together with the appended drawings .
Summary of Invention This invention comprises generally a central red zone in an otherwise clear contact lens . In its preferred form a thin layer of red coloration is placed on the center of the external surface of a clear corneal contact lens . This invention is applicable to
hard, soft and gas-permeable contact lenses. The central red coloration is in line with the axis of the pupil and is preferably of a diameter such as to cover light entering the pupil, the remainder of the lens being clear. The coloration may be applied by painting, silk screening, stamping, or imprinting. Light having a wave length of below about 6000 A is substantially all absorbed. The red zone of the lens has transmissions of at least 60% of light of a wave length above about 6000 A.
A lens made in accordance with this invention typically has a lens thickness in the order of 0.15 mm. The size of the lens depends somewhat on the size of the eye to be fitted and is in the range of 11-15 mm., the average diameter of the cornea of an eye being 12 mm. However, many individuals have diameters which are larger or smaller and eyelid openings which are larger or smaller. Similarly the average radius of a cornea is between 42 and 44 diopters but many corneas are steeper and flatter. Proper positioning of the lens of the present invention on a cornea is dependent on these factors as well as weight.
Brief Description of Drawings Fig. 1 is a diagrammatic section of an eye with a lens of this invention in position on the cornea of the eye.
Fig. 2 is a side view of the lens alone.
Fig. 3 is a front view of the lens alone.
The lens 15 is seated on the cornea 11 of the eye 10 so that the external central red-colored area 16 covers the light entering the eye through the cornea 11, anterior chamber 12, pupil of the iris 14, and eye lens 13.
Specific Examples of Invention Example 1 A clear soft corneal contact lens having a diameter of 14.5 mm. was coated on its spherical external center with a thin layer of red dye solution on an area having a diameter of 6mm. The colored area which is at the corneal apex is in the axis of the pupil of the eye. The application of the thin red layer was limited to the center area and the rest of the lens was left clear. The particular dye used was Passaic Color and Chemical Co. "Oil Red 2144" which is insoluble in water but soluble in aromatic hydrocarbon. Transmission of light through the red spot was substantially all above 6000 A with very little transmission below.
Example 2. A clear gas-permeable contact lens having a diameter of 14.5 mm. was coated on its exterior center in the manner specified in Example 1. Transmission of light through the red spot was similar to that in Example 1.
Upon clinical tests, I found that a thin red layer of this sort which covered the pupil was sufficient to provide a similar increase in color discrimination as when the entire lens was red colored.
The soft and gas -permeable lenses o f this invention are not only more comfortable to wear, but can be worn for much longer periods of time than a hard lens . In addition , since the colored area is much smaller there is a marked reduction in the color an observer notes in the eye. Further, the lens can be made sufficiently large to enable ready and stable centration, without jeopardizing oxygen-transmission.
Claims
1. A soft or gas-permeable corneal contact lens which improves the color discrimination of a color blind person , said lens comprising a clear, corneal contact lens having on the central portion of its exterior surface a thin layer of red coloration, light passing through the red layer having substantially all its transmission above about 6000 Angstroms ; said red layer being of a diameter such as to cover l ight entering the pupil , the remainder of the lens being clear.
2 . The lens of Claim 1 where in the lens is a soft lens .
3. The lens of Claim 1 wherein the lens is a gas- permeable lens.
4. The lens of Claim 1 wherein the transmission is at least 60% .
AMENDED CLAIMS
[received by the International Bureεu on 13 May 1992 (13.05.92); new claim 5 added; other claims unchanged (1 page)]
Claims
1. A soft or gas-permeable corneal contact lens which improves the color discrimination of a color blind person, said lens comprising a clear, corneal contact lens having on the central portion of its exterior surface a thin layer of red coloration, light passing through the red layer having substantially all its transmission above about 6000 Angstroms; said red layer being of a diameter such as to cover light entering the pupil, the remainder of the lens being clear.
2. The lens of Claim 1 wherein the lens is a soft lens.
3. The lens of Claim 1 wherein the lens iε a gas- permeable lens.
4. The lens of Claim 1 wherein the transmission is at least 60%.
5. A soft corneal contact lens which improves the color discrimination of a color-blind person when applied to one eye only, said lens comprising a clear, soft, corneal contact lens having on the central portion of its exterior surface a thin layer of red coloration characterized as being insoluble in water but soluble in aromatic hydrocarbon; light passing through the red layer having substantially all its transmissions above about 6000 A; said red layer continuously covering substantially all the light normally admitted to the pupil of the eye during the daytime and being in line with the axis of the pupil; said lens being sufficiently large to enable ready and stable centration without jeopardizing oxygen transmission.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/731,176 US4634743A (en) | 1983-08-22 | 1985-05-06 | Novel polyether polycarbonate block copolymers and polyurethanes prepared therefrom |
US07/522,067 US4998817A (en) | 1985-05-08 | 1990-05-10 | Contact lens for correction of color blindness |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992012451A1 true WO1992012451A1 (en) | 1992-07-23 |
Family
ID=27060691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1991/000020 WO1992012451A1 (en) | 1985-05-06 | 1991-01-03 | Contact lens for correction of color blindness |
Country Status (1)
Country | Link |
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WO (1) | WO1992012451A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10259261A1 (en) * | 2002-12-17 | 2004-07-15 | Gregor, Markus J., Dr. | Human eye protection and correction device comprises a filter assembly for protection against electromagnetic radiation and or correction of sight abnormalities, such as near or far sightedness and color blindness |
WO2013060149A1 (en) * | 2011-10-26 | 2013-05-02 | 东莞鸿胜光学眼镜有限公司 | Wavelength compensation structure |
EP3677951A1 (en) * | 2019-01-04 | 2020-07-08 | Nam Gi Min | Color weakness contact lens comprising a micro-pattern having photonic crystal structure |
US10935814B2 (en) | 2017-12-06 | 2021-03-02 | Hue.Ai, LLC | Optical device for enhancing human color vision with improved cosmetic appearance |
US11513367B2 (en) | 2019-04-24 | 2022-11-29 | Tectus Corporation | Contact lenses with oxygen-impermeable optical filters |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3034403A (en) * | 1959-04-03 | 1962-05-15 | Neefe Hamilton Res Company | Contact lens of apparent variable light absorption |
US3586423A (en) * | 1970-06-24 | 1971-06-22 | Harry I Zeltzer | Method of improving color discrimination |
US3701590A (en) * | 1971-11-08 | 1972-10-31 | Harry I Zeltzer | Method of improving color discrimination |
US4252421A (en) * | 1978-11-09 | 1981-02-24 | John D. McCarry | Contact lenses with a colored central area |
-
1991
- 1991-01-03 WO PCT/US1991/000020 patent/WO1992012451A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3034403A (en) * | 1959-04-03 | 1962-05-15 | Neefe Hamilton Res Company | Contact lens of apparent variable light absorption |
US3586423A (en) * | 1970-06-24 | 1971-06-22 | Harry I Zeltzer | Method of improving color discrimination |
US3701590A (en) * | 1971-11-08 | 1972-10-31 | Harry I Zeltzer | Method of improving color discrimination |
US4252421A (en) * | 1978-11-09 | 1981-02-24 | John D. McCarry | Contact lenses with a colored central area |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10259261A1 (en) * | 2002-12-17 | 2004-07-15 | Gregor, Markus J., Dr. | Human eye protection and correction device comprises a filter assembly for protection against electromagnetic radiation and or correction of sight abnormalities, such as near or far sightedness and color blindness |
WO2013060149A1 (en) * | 2011-10-26 | 2013-05-02 | 东莞鸿胜光学眼镜有限公司 | Wavelength compensation structure |
US10935814B2 (en) | 2017-12-06 | 2021-03-02 | Hue.Ai, LLC | Optical device for enhancing human color vision with improved cosmetic appearance |
US11789293B2 (en) | 2017-12-06 | 2023-10-17 | Hue.Ai, LLC | Optical device for enhancing human color vision with improved cosmetic appearance |
EP3677951A1 (en) * | 2019-01-04 | 2020-07-08 | Nam Gi Min | Color weakness contact lens comprising a micro-pattern having photonic crystal structure |
US11513367B2 (en) | 2019-04-24 | 2022-11-29 | Tectus Corporation | Contact lenses with oxygen-impermeable optical filters |
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