Asymmetric aspheric contact lens

G - Physics – 02 – C

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G02C 7/04 (2006.01)

Patent

CA 2169619

A contact lens (50) for use on a patient's eye with an asymmetric aspheric cornea (10"), the lens (50) having an anterior surface (52), a posterior surface (54) and a base, the posterior surface (54) having a peripheral portion which is asymmetric and aspherical and at least coextensive with the base of the lens. The peripheral portion asymmetrically and aspherically matching a corresponding peripheral portion of the cornea (10") which lies under the peripheral portion of the lens when the lens is worn in the patient's eye. The contact lens (50) is not substantially greater in diameter than said cornea (10"). The process for manufacturing the lens (50) uses three-dimensional topographic data (including elevation data) from a multiplicity of points (A', B') on the cornea. The data is used to shape at least the peripheral portion of the posterior surface (54) of the lens (50) to cause it to conform to and/or match the corresponding surface of the cornea (10").

L'invention concerne une lentille de contact (50) destinée à un oeil de patient dont la cornée est dissymétrique et asphérique. Cette lentille est caractérisée par sa surface antérieure (52), sa surface postérieure (54) et une base. La surface postérieure (54) comporte une partie périphérique qui est dissymétrique et asphérique et se prolonge par la base de la lentille. La partie périphérique de la lentille s'adapte de façon dissymétrique et asphérique à la partie correspondante de la cornée (10'') située sous la partie périphérique de la lentille lorsque la lentille est placé sur l'oeil du patient. La lentille de contact (50) n'est pas particulièremnt plus grande quant à son diamètre que ladite cornée (10''). Le procédé de fabrication de la lentille (50) utilise des coordonnées topographiques tridimensionnelles, et notamment des données d'élévation, concernant plusieurs points (A', B') de la cornée. Les données servent à donner sa forme principalement à la partie périphérique de la surface postérieure (54) de la lentille (50) de façon à ce qu'elle corresponde et/ou s'adapte à la surface de la cornée (10'').

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Asymmetric aspheric contact lens does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Asymmetric aspheric contact lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Asymmetric aspheric contact lens will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFCA-PAI-O-2045760

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.