GB8707731D0 - Forming opaque coloured areas in contact lenses - Google Patents

Forming opaque coloured areas in contact lenses

Info

Publication number
GB8707731D0
GB8707731D0 GB8707731A GB8707731A GB8707731D0 GB 8707731 D0 GB8707731 D0 GB 8707731D0 GB 8707731 A GB8707731 A GB 8707731A GB 8707731 A GB8707731 A GB 8707731A GB 8707731 D0 GB8707731 D0 GB 8707731D0
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
GB8707731A
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
Priority to GB8707731A priority Critical patent/GB8707731D0/en
Publication of GB8707731D0 publication Critical patent/GB8707731D0/en
Priority to GB8807172A priority patent/GB2202962A/en
Pending legal-status Critical Current

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  • 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.
GB8707731A 1987-04-01 1987-04-01 Forming opaque coloured areas in contact lenses Pending GB8707731D0 (en)

Priority Applications (2)

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

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 (1)

Publication Number Publication Date
GB8707731D0 true GB8707731D0 (en) 1987-05-07

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 After (1)

Application Number Title Priority Date Filing Date
GB8807172A Pending GB2202962A (en) 1987-04-01 1988-03-25 Method of forming opaque coloured areas in hydrogel 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
GB2202962A (en) 1988-10-05
GB8807172D0 (en) 1988-04-27

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