title: Evaluation of ophthalmic materials.
abstract: Ophthalmic materials from 11,677 spectacle-prescription orders were evaluated during an 18-mo period in a university optometry clinic. Five percent of the orders received were not acceptable based on criteria stemming from the ANSI-Z80. 1-1972 standards. Almost two-thirds of these rejections were lens related. Frame-related rejections were predominantly due to gross human error. Rejection rate and delivery time varied widely among the supplying laboratories. Rejection rate did not decrease with increased delivery time. Since notifying the laboratories of our results, the percentage of unacceptable orders has decreased.
mesh_terms: D005069:Evaluation Studies as Topic; D005139:Eyeglasses / Q000592:standards*; D006801:Humans; D011786:Quality Control