Contact lens with filtering for outdoor sporting and recreational activities
US6305801A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1999 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Dec 2, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A contact lens has at least one optical filter region that can be surrounded by a clear optical region. The one or more filter regions have a diameter such that an increasing percentage of visible light is transmitted to the pupil of the eye as lighting conditions change from high-intensity lighting environments to low-intensity lighting environments. The cooperation between the changing pupil and lens provides an automatic adjustment of light intensity perceived by the wearer in response to the changing light conditions. Different filtering characteristics are provided in the filter regions to enhance perception of light corresponding to light reflected by an object or background scene used in outdoor sporting and recreational activities, while attenuating other reflected light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.