Originally Posted by
rbaker
You do not have to be concerned with the statistical testing. That responsibility falls upon the manufacturer of stock finished lenses. On surfaced jobs you can again rely on historical testing by surfacing labs. For example a -1.00 CR-39 lens will be assumed to satisfy the FDA requirements.
Back in the sixties, when the FDA issued the first requirements for "dress" safety and "industrial" safety it was a major shock to the eyeglass business. In most businesses glass was the predominant lens material and we were required to heat treat (before the days of chem tempering) and drop ball test every lens. The - 8.00 patient that had been wearing a glass rimless with a 0.8 FCT was in for a shock when he requires a new pair of lenses. On the plus side we charged an extra $10.00 for the service and were able to upgrade our boats in short order.
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