. Spectacles and eyeglasses, their forms, mounting, and proper adjustment . dark background in his left hand, and pass astraight-edged piece of paper held in his right hand betweenhis eyes and the lens. Two images of the paper will be re-flected from the lens—one formed by each surface. Anyirregularity of these surfaces will make the images appearbroken, or with wavy outlines. Fig. 45- Adjusting Spectacle Frames.—It requires some littlepractice to enable one to tell at a glance just where suchan irregularly shaped object as a spectacle frame has beenwrongly bent; having found the error, it is
. Spectacles and eyeglasses, their forms, mounting, and proper adjustment . dark background in his left hand, and pass astraight-edged piece of paper held in his right hand betweenhis eyes and the lens. Two images of the paper will be re-flected from the lens—one formed by each surface. Anyirregularity of these surfaces will make the images appearbroken, or with wavy outlines. Fig. 45- Adjusting Spectacle Frames.—It requires some littlepractice to enable one to tell at a glance just where suchan irregularly shaped object as a spectacle frame has beenwrongly bent; having found the error, it is a more simplematter to correct it. For the latter purpose two smallpliers are required. They should have narrow but strongjaws, round in one pair and square in the other. As foundin the shops, the grasping surfaces of the jaws are generally tore 7« SPECTACLES AND EYEGLASSES. roughened, but should be smoothed off with a file, lestthey scar the gold when in use. A small, stout screw-driverwith a point suited to the screws of spectacles will also benecessary. Fig. Eye wires are generally of such light material as to taketheir shape from the contained glass, and are, therefore, notliable to become misshapen. Sometimes the long axis of anoval eye gets rotated within the eye wire (Fig. 45), so thatit no longer stands squarely across the face. By loosening Fig. 47-
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecteyeglasses, bookyear1
