Abstract: A method of and an apparatus for processing a peripheral edge of a lens for spectacles are arranged such that a configuration of a lens frame of a spectacle framework is measured, and the peripheral edge of the spectacle lens is ground on the basis of data on the lens-frame configuration obtained by the measurement. In the method and apparatus, a locus of a center of a disc-shaped measuring probe moving along an inner periphery of the lens frame of the spectacle framework is first measured, and an envelope is obtained which is located on the outside of circles each having a center located on said locus and a radius equal to the sum of a radius of a columnar grindstone and a radius of the measuring probe. A rotational axis of an unprocessed lens is moved along said envelope relatively to a rotational axis of the columnar grindstone, to process a peripheral edge of the unprocessed lens.