. Spectacles and eyeglasses, their forms, mounting, and proper adjustment . e difficulty; in thesecond, take the end piece in the round-jawed pliers, thejaws being applied to its edges close up to the eye these pliers in the left hand, apply the square jawsof the other pliers to the surfaces of the end piece; when,by twisting the latter about its long axis, the temple maybe turned down to any desired extent. Thus, the temple INSPECTION AND ADJUSTMENT OF SPECTACLES. 83 is not bent at all, but the end piece between the hinge andthe eye wire. Nearly the same effect may be produced by
. Spectacles and eyeglasses, their forms, mounting, and proper adjustment . e difficulty; in thesecond, take the end piece in the round-jawed pliers, thejaws being applied to its edges close up to the eye these pliers in the left hand, apply the square jawsof the other pliers to the surfaces of the end piece; when,by twisting the latter about its long axis, the temple maybe turned down to any desired extent. Thus, the temple INSPECTION AND ADJUSTMENT OF SPECTACLES. 83 is not bent at all, but the end piece between the hinge andthe eye wire. Nearly the same effect may be produced bybending the wire of the temple close up to the hinge. Aswas remarked before, in speaking of the facing of the glasses,the effect of turning down both temples is not to make bothlenses stand higher upon the face but to make the glassesface more downward. Sometimes when the glasses do not sit properly thetrouble will be found to be not in the frames but in thewearer. A considerable amount of asymmetry of the twosides of the face is not uncommon. One ear or one eye Fig. may be higher than its fellow, either of which conditionswill make the glasses seem awry, and render necessary acompensating asymmetry of their frames. Adjustment of Eyeglasses.—The starting-point in ad-justing eyeglasses is at the nose-pieces, whose free sur-faces should be made to conform accurately to the bones ofthe nose by which they are supported. When receivedfrom the maker they are generally curved, presenting aconvexity toward the nose. As the bones of the sides ofthe nose at the point where the guards are to rest areusually more or less convex also, the bearing obtained isa most insecure and uncomfortable one, as a glance at will show. In Fig. 53 this glass is shown with its nose- 84 SPECTACLES AND EYEGLASSES. pieces properly adapted to the sides of the nose. Any con-formation may be required, but that shown in Fig. 53 isthe one most frequently needed. These changes in theshape of the nose-p
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecteyeglasses, bookyear1
