Patent ID: 6637880
Filing Date: 2003-10-28
Classification: G02C,G05B

Abstract:
A spectacle lens, wherein there is determined, by either measurement or specification for an individual spectacles wearer, a value of the distance VR from a reference point on the back surface of a spectacle lens to the center of rotation of the eye, which is given by adding a value of the distance VC from a reference point on the back surface of a spectacle lens to the vertex of the cornea of the eye of a spectacles wearer when spectacles are being worn, which is one of the required data in spectacle lens design, and the distance CR from said cornea vertex to the center of rotation of the eye, which is calculated by measuring the axial length CO of the eye of a spectacles wearer and using a value obtained based on measurement data thereof, and the spectacle lens is designed using the value VR thereof, and is manufactured based on the design specifications.