The Frame and Fit
08-2008
FRAME ANATOMY – Metal and plastic frames are made up of a front and temples (Fig. 1). The temples may have spring hinges or fixed barrel hinges. Three piece mountings include a bridge, two endpieces and temples (Fig. 2). In some titanium frames, the temple and endpiece are all in one so there are no screws. Semi-rimless frames are composed of fronts of eyewires and endpieces plus temples (Fig. 3).The nylon cord is looped through the eyewire end that applies tension to the lens as the nylon is stretched around the lens.
From the front, using this Bvlgari frame (Fig. 4), we can see how to measure frame dimensions using the Boxing System. This frame is 54mm wide by 28mm high and has a 17mm bridge. Remember, the size of the frame is measured as the lens size i.e., from the edge of the lens and not the inside edge of the frame so always consider the depth of the bevel.
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