Tinted contact lens and method for making same
US6488375B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 28, 1999 |
| Grant date | Dec 3, 2002 |
| Priority date | — |
| Expiry date | Oct 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/046
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A tinted contact lens for insertion into an eye comprises a contact lens substrate and an iris-simulating pattern on the lens substrate. The iris simulating pattern comprises at least four distinctly colored colorants. A method for making a tinted contact lens for insertion into an eye comprises providing a plate having a surface, and lasing the plate to form at least one depression in the surface of the plate. The depression is of a shape constituting an iris portion pattern. A fluent colorant is introduced into the depression. The colorant is then transferred from the depression to a lens substrate in a manner so that the colorant colors the lens substrate in a colorant pattern of substantially the same shape as the iris portion pattern of the depression.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.