Patent ID: 6817713
Filing Date: 2004-11-16
Classification: G02C,G06Q

Abstract:
A spectacle supply method, in which a computer is set up on a spectacle lens order side and a computer that is connected to this order-side computer such that information can be mutually exchanged is provided on the manufacturer side, and spectacle lenses are supplied by having the order-side computer and the manufacturer-side computer perform commutations according to specific input operations and perform the processing required for the taking and/or placing of order for spectacle lenses while exchanging information with each other,characterized in that when spectacle lens information, spectacle frame information, prescription values, layout information, processing instructions information, and other such processing condition data required for processing is transmitted by the order-side computer to the manufacturer-side computer, a lens design program installed on the manufacturer-side computer performs optical lens design tailored to the customer on the basis of the transmitted processing condition data so that base curves on the left and right convex surface sides approximate each other and at least one optical performance of the left and right lenses, which is selected among astigmatism, curvature of field, and distortion, is similar, when the difference in prescription between the left and right eyes is over a specific amount, and the lenses are manufactured according to this design; and comprising the steps of: selecting the left and right lenses from a lens design table prepared on the basis of prescription values when the lens design program approximates the optical performance of the left and right eyes to each other; comparing the convex surface base curve difference between the selected left and right lenses; and when this base curve difference is over a predetermined standard, performing lens redesign in which the convex surface curve of one lens is made to have an aspherical shape similar to that of the convex surface curve of the other lens so that the astigmatism is substantially the same.