Disinfection of contact lenses
US4642234A · kind A · utility
6Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1985 |
| Grant date | Feb 10, 1987 |
| Priority date | — |
| Expiry date | May 14, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/2086
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Hydrophilic soft contact lenses are disinfected by soaking in a non-eye-irritant aqueous disinfecting solution obtained by the addition to tap water of a chlorhexidine salt, a sequestering agent for calcium and magnesium ions, and a dechlorinating agent. Suitably, the solution is obtained by dissolving a tablet in tap water. The preferred sequestering agent is sodium tripolyphosphate and the preferred dechlorinating agent is sodium thiosulphate. Advantageously, the chlorhexidine salt is provided in solid solution in urea to assist complete dissolution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.