SPECTACLE LENS AND APPARATUS FOR PRODUCTION OF SPECTACLE LENS

摘要

PROBLEM TO BE SOLVED: To provide spectacles which are cozy to wear by adjusting the weights of lenses in such a manner that the weights acting on the right and left pads of the spectacles are made uniform to obviate the imbalance of the weights acting on the right and left pads in the state of putting the lenses in the frame of the spectacles and the consequent occurrence of an uncomfortable feel as a result of a difference in the prescription or layout of the right and left spectacle lenses. SOLUTION: The two right and left spectacle lenses framed into the spectacle frame are so constituted that the product M1 of a distance L1 from the perpendicular bisector of the spectacle frame to a centroid position G1 of the lens for the right eye and the weight W1 of the lens for the right eye and the product 2 of a distance L2 from the perpendicular bisector of the spectacle frame to the centroid position G2 of the lens for the left eye and the weight W2 of the lens for the left eye satisfy the equation|M1-M2|<=0.00005[kg.m].