G - Physics – 02 – C
Patent
G - Physics
02
C
G02C 7/02 (2006.01)
Patent
CA 2445706
It is made possible to easily obtain a spectacle lens with higher performance in a spectacle lens designing method in which an eyeball motion (Listing's Law) is taken into consideration. A spectacle lens designing method in which an eye motion (Listing's Law) is taken into consideration, and which uses, as an evaluation function regarding visual acuity constituting a merit function which is used in optimization calculation, a visual acuity evaluation function (logMAR) derived in an ordinary manner from a visual acuity measured value V which is actually measured. Note that the visual acuity evaluation function (logMAR) is represented by the following equation (1), letting a curvature of field be an ordinary aberration of a spectacle lens, and a residual astigmatism be an astigmatism extendedly defined from the spectacle lens designing in which the Listing's Law is taken into consideration. the visual acuity evaluation function logMAR = log10(1/V(curvature of field, residual astigmatism))
La présente invention concerne un procédé de conception de verres de lunettes qui tient compte du mouvement de l'oeil (loi de Listing) et permet de produire facilement un verre de lunette de haute performance. Le procédé de l'invention fait appel à une fonction de performance visuelle (logMAR) qui est généralement dérivée de la valeur de l'acuité visuelle mesurée (V), et qui est utilisée comme une fonction de performance de l'acuité visuelle et comme une fonction de valeur permettant le calcul de l'optimisation. La performance d'acuité visuelle (logMAR), lorsque la courbure de champ constitue l'aberration d'un verre de lunettes normal et l'astigmatisme résiduel constitue un astigmatisme dont la définition est étendue par la conception du verre de lunettes tenant compte de la loi de Listing de l'invention, est exprimée par la formule (1) ci-après LogMAR = log10 (1/V (courbure de champ, astigmatisme résiduel).
Dennison Associates
Hoya Corporation
LandOfFree
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