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. 02, 1997
Filed:
Jun. 14, 1996
Applicant:
Inventors:
Jerome A Legerton, Los Gatos, CA (US);
Chun-Shen Lee, Cupertino, CA (US);
John M Evans, Fremont, CA (US);
Praful C Doshi, Poway, CA (US);
Assignee:
PBH, Inc., Sunnyvale, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
A61F / ;
U.S. Cl.
CPC ...
623-6 ; 3511 / ; 351162 ;
Abstract
An annular mask lens for the treatment of optical aberrations such as but not limited to night myopia, spherical aberration, aniridia, keratoconus, corneal scarring, penetrating keratoplasty, and post refractive surgery complication. The lens has an annular mask having an aperture larger than conventional pinhole contact lens. The aperture having a 'soft' inside edge and which mask has a gradually increasing transmissivity radially toward the outer edge of the mask.