Method and composition for reducing contact lens swelling
US7247270B2 · kind B2 · utility
10Cited by
13References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2006 |
| Grant date | Jul 24, 2007 |
| Priority date | — |
| Expiry date | Feb 15, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/3776
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention is directed to an ophthalmic solution for soft contact lenses for controlled release of polyethers into an eye's tear film. Polyether components of the subject solution are released from the soft contact lens material matrix over long time periods to produce longer lasting wetting performance, improved lubricity, improved end-of-the-day comfort and reduced feeling of dryness from wearing contact lenses. The present invention also includes the use of cationic polyelectrolytes for controlling the swelling of hydrogel contact lenses typically caused by the absorption of high concentrations of polyethers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.