Method for producing tinted contact lenses
US7165839B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2004 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Apr 27, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D11/00317
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a method of producing a full-body tinted contact lens. The method of the invention comprises the steps of: preconditioning particles of a pigments; dispersing the preconditioned pigment particles in a polymerizable fluid composition to obtain a pigment-containing polymerizable dispersion; introducing an amount of the pigment-containing polymerizable dispersion in a mold for making a contact lens; polymerizing the polymerizable dispersion in the mold to form a full-body tinted contact lens with the particles of the pigment entrapped and distributed therein. In addition, the invention provides a method for preparing preconditioned pigment particles and full-body tinted contact lenses produced according the method of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.