Abstract: A magnetic chuck for use in grinding optical lenses consisting of a means for increasing or decreasing the magnetic force exerted by a magnetic attachment surface contained in a housing sized for use in a lens grinding machine, wherein the means for increasing or decreasing the magnetic force exerted by the magnetic attachment surface is operated by means of manually operating a control to rotate a permanent magnet 90 degrees from a first position to a second position, where in the first position the magnetic force exerted by the magnetic attachment surface is minimal and in the second position, a substantial increase of magnetic force is exerted by the magnetic attachment surface for secured attachment of the lens piece during grinding of a raw glass lens blank into an optical lens.

Abstract: A method of forming the bridge portion of a conventional eyeglass frame to the exact configuration and dimension of a bridge portion of a predetermined wearer's nose and securing the formed bridge portion to a conventional eyeglass frame. Proper fitting of the formed bridge portion to the wearer's nose is thereby accomplished and slipping of the eyeglasses from the nose is thereby eliminated.