Contact lens
US5302978A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1991 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | Oct 21, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/002
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A contact lens of generally disc-like configuration having a central axis extending through the contact lens and about which the contact lens is substantially symmetric in configuration. The contact lens has PA1 a pupil zone through which the central axis extends and which comprises the area immediately circumferentially surrounding the central axis; PA1 an iris zone, which comprises the area circumferentially surrounding the pupil zone; and PA1 a peripheral zone which comprises the area circumferentially surrounding the iris zone and extends to the edge of the contact lens. Further in the area immediately adjacent to the periphery of the iris zone and the contact lens and circumferentially extending therearound a band of dark substantially light-absorbing color is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.