Patent ID: 6871955
Filing Date: 2005-03-29
Classification: G02C,G05B

Abstract:
1. A multifocal spectacle lens having individual specifications, 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, and there is determined, by using the VR value, layout of a near portion including height of the near portion of the multifocal spectacle lens including a progressive refractive power spectacle lens, and thereby, the spectacle lens is designed for each individual spectacles wearer and is manufactured based on the design specifications.