. Spectacles and eyeglasses, their forms, mounting, and proper adjustment . the plane of thecircle. A familiar example of the torus is the circular con-vex molding at the base of an architectural column. Aglass ground upon a wheel having this form will presenttwo cylindrical curves at right angles to each other, onedepending on the radius of the wheel, and the other on theradius of the convexity of its rim. It would seem thattoric lenses is the proper designation of these 5, A, represents a concave toric lens. In the same GENERAL CONSIDERATIONS. 21 figure, b is a concave cylindric
. Spectacles and eyeglasses, their forms, mounting, and proper adjustment . the plane of thecircle. A familiar example of the torus is the circular con-vex molding at the base of an architectural column. Aglass ground upon a wheel having this form will presenttwo cylindrical curves at right angles to each other, onedepending on the radius of the wheel, and the other on theradius of the convexity of its rim. It would seem thattoric lenses is the proper designation of these 5, A, represents a concave toric lens. In the same GENERAL CONSIDERATIONS. 21 figure, b is a concave cylindrical lens, introduced for thesake of comparison. Those who have used these glasses consider them muchmore satisfactory than glasses made by the commonmethod, and they should be borne in mind when prescrib-ing for high astigmatism in patients who use their eyes agreat deal for work requiring accuracy. Eye Wires, Temples, and Bridges.—Eye wires are madeby wrapping the untempered wire, in the form of a spiral,closely about^a flattened metal cylinder. Being tempered Fig.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecteyeglasses, bookyear1
