GB8707731D0 - Forming opaque coloured areas in contact lenses - Google Patents
Forming opaque coloured areas in contact lensesInfo
- 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
Links
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.
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)
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)
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 |
-
1987
- 1987-04-01 GB GB8707731A patent/GB8707731D0/en active Pending
-
1988
- 1988-03-25 GB GB8807172A patent/GB2202962A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
GB2202962A (en) | 1988-10-05 |
GB8807172D0 (en) | 1988-04-27 |
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