. Spectacles and eyeglasses, their forms, mounting, and proper adjustment . 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-. the screw it can readily be re-adjusted. Abnormal crooked-ness about the bridge is best disclosed by placing a straightedge (indicated by the line S E in Figs. 45, 46, 48, 49 and50) in such a position as to enable one to
. Spectacles and eyeglasses, their forms, mounting, and proper adjustment . 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-. the screw it can readily be re-adjusted. Abnormal crooked-ness about the bridge is best disclosed by placing a straightedge (indicated by the line S E in Figs. 45, 46, 48, 49 and50) in such a position as to enable one to compare the twosides of the frame. If the bridge is bent at its junction INSPECTION AND ADJUSTMENT OF SPECTACLES. 79 with the eye wire a rotation results, looking very muchlike that just mentioned, but dependent upon an entirelydifferent fault (Fig. 46). It is readily corrected with pliersor ringers. The planes of the glasses may cross each other (Fig. 47),in consequence of a twist in almost any part of the bridge, Fig. 48.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecteyeglasses, bookyear1
