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:
May. 19, 1987
Filed:
Dec. 21, 1984
Applicant:
Inventor:
Otto Wichterle, Praha, CS;
Assignee:
Ceskoslovenska akademie ved, , CS;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02C / ;
U.S. Cl.
CPC ...
3511 / ; 351162 ; 351177 ;
Abstract
A perforated soft contact lens which has at least one perforation formed inside the optical zone of lens, i.e. in the distance 0 to 3.5 mm from the lens center. It is manufactured by placing the lens in a swollen state with its inner surface on an elastic base and pressing a punch perpendicularly to the outer surface. Further possible method of manufacturing consists in sticking the soft hydrophilic lens on a hard base, drying and then drilling the openings, advantageously to the first contact of a drill with the base.