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front.22 The operator manipulated the right and left lenses into
the respective eyewires of the front in a manner intended to
avoid canted eyes (i.e., improper rotation and seating of the
lenses in the fronts), partially assembled sunglasses (on which
the lens could pop out after the lens screw had been tightened),
and chipped or scratched lenses. If the lens had been larger
than the nominal specification for lenses, or the frame had been
smaller than the nominal specification for frames, the operator
might have had to turn the lens screw more. If the operator had
opened the lens screw too far, the screw might have popped out of
the hole and the operator would have had to begin the process
again. On the other hand, if the operator had not opened the
lens screw far enough, the operator, by applying too much pres-
sure trying to force the lens into place, might have chipped the
lens, which would have caused the lens to be rejected as unac-
ceptable for use in B&L sunglasses.
After inserting the lenses, the operator inserted a temple
into the endpiece of the front, aligning the holes of the temple
with the holes of the endpiece.23 The operator maintained that
alignment with one hand and picked up a tiny screw that was 2.5
to 3 millimeters in length and .5 to 1 millimeter in diameter and
22 B&L and we refer to the process of inserting lenses into the
fronts as lensing.
23 B&L and we refer to the process of attaching the temple to
the front as templing.
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