DESIGN METHOD FOR EYEGLASS LENS, PRODUCTION METHOD FOR EYEGLASS LENS, EYEGLASS LENS, AND EYEGLASSES

Abstract: there are provided a method for designing a spectacle lens and a related technique thereof, the method including: a modeling step of dividing a pattern into multiple models with a deviation from a normally worn state of the spectacle lens as decentering, in which a reference model, a decenter model, and a tilt model are prepared as the multiple model; a sensitivity calculation step of calculating a decenter sensitivity and a tilt sensitivity; and a design step of using a base curve value in the vicinity of a balance solution as a base curve of the spectacle lens, wherein a base curve value c [unit: diopter (d)] which is a curvature of a surface in a region h where the on-retinal non-convergence region is not provided on an object-side surface is taken as x-axis, and the decenter sensitivity and the tilt sensitivity [unit: diopter (d)] are taken as y-axis, and an intersection of a plot of the decenter sensitivity and a plot of the tilt sensitivity is taken as the balance solution.

Inventor(s): Shohei MATSUOKA, Seitaro TATEJIMA

CPC Classification: G02C7/06 (bifocal; multifocal {; progressive ( takes precedence)})

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