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:
Sep. 22, 1998
Filed:
Sep. 04, 1996
Leonard Seidner, Manalapan, NJ (US);
Maurice Poster, Jericho, NY (US);
Pemrable Technologies Inc., Morganville, NJ (US);
Abstract
A pair of multifocal contact lenses for a patient comprises a first corneal contact lens having a concave posterior surface and a convex anterior surface. The anterior surface is formed with a power curve including a circular intermediate vision correction zone and an annular distance vision correction zone contiguous with the intermediate vision correction zone. The distance vision correction zone is concentric or coaxial with the intermediate vision correction zone. A second corneal contact lens of the pair also a concave posterior surface and a convex anterior surface. The anterior surface of the second lens is formed with a power curve including a circular intermediate vision correction zone and an annular near vision correction zone contiguous with the respective intermediate vision correction zone. The near vision correction zone is concentric or coaxial with the intermediate vision correction zone of the second lens. The intermediate vision correction zone of the first lens and the distance vision correction zone have optical powers differing in magnitude by less than approximately 1.5 diopters. Similarly, the intermediate vision correction zone of the second lens and the near vision correction zone have optical powers differing in magnitude by less than approximately 1.5 diopters.