Spectacle lens evaluating method, spectacle lens designing method using same, spectacle lens manufacturing method, spectacle lens manufacturing system, and spectacle lens
AssigneeHoya Corporation
InventorTetsuma Yamakaji
Life of this patent
Estimating the term…
Abstract
More appropriate evaluation, design, and manufacture are made feasible by taking visual functions into consideration more appropriately. In order to achieve this object, in the present invention, provided is a spectacle lens evaluation method for evaluating spectacle lenses using a visual acuity function, characterized in that the visual acuity function includes relative accommodation power as a factor, the relative accommodation power referring to the range expressed in terms of diopter in which distinct vision is achieved while maintaining convergence of a gaze point.
Claims19
A method for manufacturing a spectacle lens, comprising steps of:
- calculating a visual acuity function including relative accommodation power as a factor;
- optimizing optical performance values with respect to a plurality of evaluation points on said spectacle lens by using the calculated visual acuity function as an evaluation function;
- determining optical design values based on the optical performance values with respect to the plurality of evaluation points on said spectacle lens that have been optimized using the visual acuity function;
- and
- creating said spectacle lens using the optical design values which have been deteremined,
- wherein in the step of determining optical design values, the optical design values are determined such that a refractive power is the one that shifts a range of distinct vision corresponding to relative accommodation power.
A computerized system for designing a spectacle lens, comprising:
- a computerized means for calculating a visual acuity function including relative accommodation power as a factor;
- a computerized means for optimizing optical performance values with respect to a plurality of evaluation points on said spectacle lens by using the calculated visual acuity function as an evaluation function;
- and
- a computerized means for determining optical design values based on the optical performance values with respect to the plurality of evaluation points on said spectacle lens that have been optimized using the visual acuity function, wherein the optical design values are determined such that a refractive power is the one that shifts a range of distinct vision corresponding to relative accommodation power.
Dependencies are inferred from the claim text.