GB8807172D0 - Method of forming opaque coloured areas in contact lenses - Google Patents

Method of forming opaque coloured areas in contact lenses

Info

Publication number
GB8807172D0
GB8807172D0 GB8807172A GB8807172A GB8807172D0 GB 8807172 D0 GB8807172 D0 GB 8807172D0 GB 8807172 A GB8807172 A GB 8807172A GB 8807172 A GB8807172 A GB 8807172A GB 8807172 D0 GB8807172 D0 GB 8807172D0
Authority
GB
United Kingdom
Prior art keywords
lens
silver
contact lenses
treated
coloured areas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
GB8807172A
Other versions
GB2202962A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CooperVision Optics Ltd
Original Assignee
CooperVision Optics Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CooperVision Optics Ltd filed Critical CooperVision Optics Ltd
Publication of GB8807172D0 publication Critical patent/GB8807172D0/en
Publication of GB2202962A publication Critical patent/GB2202962A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00865—Applying coatings; tinting; colouring
    • B29D11/00894—Applying coatings; tinting; colouring colouring or tinting
    • B29D11/00903—Applying coatings; tinting; colouring colouring or tinting on the surface
    • 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
    • G02C7/021—Lenses; Lens systems ; Methods of designing lenses with pattern for identification or with cosmetic or therapeutic effects
    • 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
    • G02C7/046—Contact lenses having an iris pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0025—Opaque

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Eyeglasses (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)

Abstract

A method for opaquing and tinting selected areas of a hydrogel contact lens in which the lens is (a) masked and the unmasked area is contacted with a solution of a complex silver salt (e.g. silver ammonium nitrate), (b) the unmasked area is treated with a reducing agent (e.g. ascorbic acid or formaldehyde) to form particles of nacreous silver suspended within the lens, and (c) the lens is treated with a solution of a dyestuff (e.g. a reactive dye or vat dye) before or after steps (a) and (b). Also claimed is a hydrogel contact lens containing silver in the form of a nacreous pigment present in substantially the whole thickness of the lens.
GB8807172A 1987-04-01 1988-03-25 Method of forming opaque coloured areas in hydrogel contact lenses Pending GB2202962A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8707731A GB8707731D0 (en) 1987-04-01 1987-04-01 Forming opaque coloured areas in contact lenses

Publications (2)

Publication Number Publication Date
GB8807172D0 true GB8807172D0 (en) 1988-04-27
GB2202962A GB2202962A (en) 1988-10-05

Family

ID=10615020

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8707731A Pending GB8707731D0 (en) 1987-04-01 1987-04-01 Forming opaque coloured areas in contact lenses
GB8807172A Pending GB2202962A (en) 1987-04-01 1988-03-25 Method of forming opaque coloured areas in hydrogel contact lenses

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8707731A Pending GB8707731D0 (en) 1987-04-01 1987-04-01 Forming opaque coloured areas in contact lenses

Country Status (1)

Country Link
GB (2) GB8707731D0 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8630363D0 (en) * 1986-12-19 1987-01-28 Igel Int Ltd Coloured hydrogel objects
US6196683B1 (en) * 1999-04-23 2001-03-06 Wesley Jessen Corporation Pearlescent contact lens
US8425926B2 (en) 2003-07-16 2013-04-23 Yongxing Qiu Antimicrobial medical devices
US8702816B2 (en) * 2006-03-03 2014-04-22 Michael D. Conte Compositions and methods for reversibly dyeing soft contact lenses
US20220057653A1 (en) * 2020-08-21 2022-02-24 Pegavision Corporation Contact lens and method of manufacturing the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1544682B2 (en) * 1963-09-11 1973-04-26 Tscheskoslovenska akademie ved , Prag PROCESS FOR THE FORMATION OF COLORED AND SIMILAR EFFECTS IN HYDROGELS, PREFERABLY FOR THE MANUFACTURING OF CONTACT LENSES
US4634449A (en) * 1986-10-03 1987-01-06 International Hydron Corporation Opaque tinting process for contact lens

Also Published As

Publication number Publication date
GB8707731D0 (en) 1987-05-07
GB2202962A (en) 1988-10-05

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