Contact lenses providing improved visual acuity

Details Contact lenses providing improved visual acuity Contact lenses providing improved visual acuity

G - Physics

02

C

G02C 7/04 (2006.01)

Patent

CA 2272940

A method for obtaining contact lenses having optimized visual acuity involves providing the anterior surface or the posterior surface of the contact lens with a conic section having a shape factor value within the range of about 0.3 to 2.0, the shape factor value being selected so as to adjust spherical aberration in the central optical zone to a value within the range of about - 0.2 diopter to about -0.6 diopter and to a value that provides optimal visual acuity.

Un procédé de production de lentilles de contact optimisant l'acuité visuelle consiste à former la surface antérieure ou postérieure de la lentille de contact avec une partie conique dont la valeur du facteur de forme se situe entre environ 0,3 et 2,0, cette valeur du facteur de forme étant sélectionnée de manière à ajuster l'aberration sphérique dans la zone optique centrale à une valeur comprise entre environ -0,2 dioptrie et environ -0,6 dioptrie et à une valeur qui assure une acuité visuelle optimale.

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