# US 8,770,746 B2 · Methods materials and systems for producing a contact lens and contact lenses produced using said methods materials and systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,770,746 B2 - Document ID: US8770746B2 - Status: Granted - Kind: B2 - Application number: 13/384,356 - Filed: 2010-07-18 - Published: 2012-05-10 - Granted: 2014-07-08 - Earliest claimed: 2009-07-18 - Applicants: Jonathan Baruch Pasternak; Vladimir Sherman - Inventors: Jonathan Baruch Pasternak; Vladimir Sherman - Web page: https://patentgrep.com/patent/US8770746B2 ## CPC - B29D 11/00048: {composed of parts with dissimilar composition (B29D11/00057 takes precedence)} - B29D 11/00038: {Production of contact lenses} - G02C 7/021: {with pattern for identification or with cosmetic or therapeutic effects (methods and processes take preference, e.g. printing, marking or copying processes B41M; identification in general G09F3/00; producing decorative effects in general B44C; surface treatment of glass C03C15/00 - C03C23/00; positioning or marking of lenses B24B13/0055)} - G02C 7/04: Contact lenses for the eyes (disinfection or sterilisation of contact lenses A61L12/00) - G02C 7/049: {Contact lenses having special fitting or structural features achieved by special materials or material structures} - B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00) - 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) ## Abstract Disclosed are methods, materials and systems for producing contact lenses and contact lenses produced using said methods, materials and systems. According to some embodiments, a contact lens produced by said methods, materials and systems includes an extra-ocular indicator (“EOI”) adapted to alter in color upon removal of said lens from an eye. The EOI may be at least partially composed of a pigment adapted to become relatively more visible when the contact lens is outside an eye than when the contact lens is placed in an eye. ## Claims ### Claim 1 A contact lens comprising: a substantially transparent contact lens material; and an extra-ocular indicator (“EOI”) embedded or in contact with at least a portion of said contact lens material, wherein said EOI is at least partially composed of a pH responsive pigment and alters in color upon removal of said contact lens from an eye. ### Claim 2 (depends on 1) The contact lens according to claim 1, wherein the EOI is adapted to become relatively more visible when said contact lens is outside an eye than when said contact lens is placed in an eye. ### Claim 3 (depends on 2) The contact lens according to claim 2, wherein said EOI is at least partially composed of a pigment adapted to alter in color upon coming in contact with organic matter. ### Claim 4 (depends on 1) The contact lens according to claim 1, wherein the EOI is adapted to become relatively less visible when said contact lens is placed in an eye than when said contact lens is outside an eye. ### Claim 5 (depends on 4) The contact lens according to claim 4, wherein said EOI is at least partially composed of a pigment adapted to alter in color upon coming in contact with organic matter. ### Claim 6 (depends on 1) The contact lens according to claim 1, wherein said EOI is at least partially composed of a pigment adapted to alter in color upon coming in contact with organic matter. ### Claim 7 (depends on 1) The contact lens according to claim 1, wherein said contact lens is at least partially composed of a material selected from the group consisting of materials identified in the market as: (1) Alphafilcon A, (2) Asmofilcon A, (3) Balafilcon A, (4) Comfilcon A, (5) Enfilcon A, (6) Galyfilcon A, (7) Hilafilcon A, (8) Hilafilcon B, (9) Hioxifilcon, (10) Lotrafilcon B, (11) Methafilcon A, (12) Omafilcon A, (13) Phemfilcon A, (14) Polymacon, (15) Senofilcon, (16) Tetrafilcon A, (17) Vifilcon A, (18) polymethyl methacrylate, (19) hydrophilic gel, (20) silicon, (21)HEMA, (22) GMA, (23) MMA, (24) NVP, (25) xerogeland and (26) rigid gas permeable polymer. ### Claim 8 (depends on 1) The contact lens according to claim 1, wherein the indicator includes a material selected from the group: (1) leuco dye, (2) lactone, (3) weak acid, (4) dodecanol, (5) spirolactones, (6) fluorans, (7) spiropyrans, (8) fulgides, (9) bisphenol A, (10) parabens, (11) 1,2,3-triazole derivates, and (12) 4-hydroxycoumarin. ### Claim 9 Contact lenses comprising: a first contact lens with a first extra-ocular indicator (“EOI”) adapted to alter to a first color upon removal of said first lens from an eye, and a second contact lens with a second extra-ocular indicator (“EOI”) adapted to alter to a second color upon removal of said second lens from an eye, wherein the first and second EOI's are each at least partially composed of a pH responsive pigment. ### Claim 10 (depends on 9) The contact lenses according to claim 9, wherein said first and second EOI's are adapted to become relatively more visible when their respective contact lens is outside an eye than when said contact lens is placed in an eye. ### Claim 11 (depends on 10) The contact lenses according to claim 10, wherein said first and second EOI's are at least partially composed of a pigment adapted to alter in color upon coming in contact with organic matter. ### Claim 12 (depends on 10) The contact lenses according to claim 10, wherein said first and second EOI's are adapted to become relatively less visible when their respective contact lens is placed in an eye than when outside an eye. ### Claim 13 (depends on 12) The contact lenses according to claim 12, wherein said first and second EOI's are at least partially composed of a pigment adapted to alter in color upon coming in contact with organic matter. ### Claim 14 (depends on 9) The contact lenses according to claim 9, wherein said contact lenses are at least partially composed of a material selected from the group consisting of materials identified in the market as: (1) Alphafilcon A, (2) Asmofilcon A, (3) Balafilcon A, (4) Comfilcon A, (5) Enfilcon A, (6) Galyfilcon A, (7) Hilafilcon A, (8) Hilafilcon B, (9) Hioxifilcon, (10) Lotrafilcon B, (11) Methafilcon A, (12) Omafilcon A, (13) Phemfilcon A, (14) Polymacon, (15) Senofilcon, (16) Tetrafilcon A, (17) Vifilcon A, (18) polymethyl methacrylate, (19) hydrophilic gel, (20) silicon, (21)HEMA, (22) GMA, (23) MMA, (24) NVP, (25) xerogeland and (26) rigid gas permeable polymer. ### Claim 15 (depends on 9) The contact lenses according to claim 9, wherein said first and second EOI's include a material selected from the group: (1) leuco dye, (2) lactone, (3) weak acid, (4) dodecanol, (5) spirolactones, (6) fluorans, (7) spiropyrans, (8) fulgides, (9) bisphenol A, (10) parabens, (11) 1,2,3-triazole derivates, and (12) 4-hydroxycoumarin.