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:
Oct. 25, 2016
Filed:
Jan. 23, 2014
Vision Crc Limited, Sydney, AU;
Brien Anthony Holden, Kingsford, AU;
Arthur Ho, Coogee, AU;
Padmaja Rajagopal Sankaridurg, Maroubra, AU;
Thomas Arthur Aller, Albany, CA (US);
Earl Leo Smith, III, Houston, TX (US);
Vision CRC Limited, Sydney, New South Wales, AU;
Abstract
A contact lens for use in controlling or retarding the progression of myopia in an eye has a central optical zone approximating the normal diameter of the pupil of the eye that gives clear central vision at distance for the wearer. An annular peripheral optical zone that is substantially outside the diameter of the pupil is formed around the central optical zone with greater refractive power than that of the central zone so that oblique rays entering the eye through the peripheral optical zone will be brought to focus at a focal plane that is substantially on or anterior to the peripheral region of the retina. Preferably, the rear surface of the lens is shaped to conform to the cornea of the eye and the front surface of the lens is shaped to provide—in conjunction with the rear surface—the desired optical properties of the central and peripheral optical zones. The front surface is also preferably contoured to form a smooth transition between the junction of the central optical zone and the peripheral optical zone, with or without designed optical properties such as progressive power.