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:
Nov. 25, 1997
Filed:
Jan. 19, 1996
Leonard Seidner, Manalapan, NJ (US);
Maurice Poster, Jericho, NY (US);
Permeable Technologies, Inc., Morganville, NJ (US);
Abstract
A multifocal contact lens customized for a patient has an anterior side with a power curve defined in part by (i) a central spheric aspheric surface, (ii) an inner annular spheric surface contiguous with the central aspheric surface, (iii) a second annular spheric surface contiguous along a radially inner periphery with the inner annular spheric surface, and (iv) an outer annular spheric surface contiguous along a radially inner periphery with the second annular spheric surface. Each of the annular spheric surfaces is concentric or coaxial with the central aspheric surface. The central aspheric surface corresponds to a distance vision correction zone. The inner annular spheric surface is an spheric surface corresponding to an intermediate vision correction zone. The second annular spheric surface corresponds to a near vision correction zone, and the outer annular spheric surface corresponds to a distant vision correction zone.