Contact lens for use with ophthalmic monitoring systems
US5903333A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1997 |
| Grant date | May 11, 1999 |
| Priority date | — |
| Expiry date | Jun 24, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A contact lens for use with pupil monitoring systems. A contact lens has a first surface that conforms to a cornea and sclera of a patient's eye, and a second surface that has a tubular extension defining a viewing port formed thereon. A distal region of the tubular extension forms an outwardly protruding lip which functions to securely engage the eyelid of a patient during the monitoring process and facilitates manipulation of the sclera contact lens while it is being inserted in or removed from a patient's eye. The lens may conform solely to the cornea of a patient's eye, and the viewing port may have a wide angle lens, polarizing element or other optical filtering element provided therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.