Process for treatment of contact lenses
US6432217B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2000 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Apr 21, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S134/901
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A contact lens is disposed in a well containing hydration fluid, such that a concave surface of the lens faces upwardly and the lens is submerged in the hydration fluid, thereby allowing contaminants to leach out of the lens into the hydration fluid. After hydration, a washing fluid is introduced into the well and contaminated hydration fluid is removed from the well so as to replace at least some of the contaminated hydration fluid in the well with the washing fluid in a predetermined fluid-exchange procedure. The washing fluid is introduced into the well so as to be directed against the concave surface of the lens and the contaminated hydration fluid is removed at a removal location remote from where the washing fluid impinges against the lens, such that the action of the introduced washing fluid serves to oppose The predetermined fluid-exchange procedure is monitored so as to establish whether the predetermined fluid-exchange procedure has been correctly performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.