The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 09, 1996
Filed:
Aug. 04, 1993
Applicant:
Inventor:
Menachem Porat, Kibbutz Hanita, IL;
Assignee:
Hanita Lenses, , IL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02C / ;
U.S. Cl.
CPC ...
351161 ;
Abstract
A multifocal contact lens, having a rear surface configured to float on a tear film covering the user's cornea, a front surface comprised of at least two contiguous surface segments, an upper surface segment optically configured to serve for distance vision and a lower surface segment optically configured to serve for near vision. In at least one peripheral zone of the lens there is provided at least one recess constituting a preferred escape aperture for parts of the tear film displaced when the contact lens slides down the user's cornea, to the effect of substantially preventing rotation of the contact tens during lens translation.