This document describes the methods currently used in applying tolerances to the focal powers of spectacle lenses and methods that can be considered for adoption in the future; it also describes methods of measuring the prism imbalance (relative prism error) between the lenses of a mounted pair. The results of a 2014 survey of manufacturing capability for lens power and a 2018 international web survey are discussed, as are possible new methods for applying tolerances to the focal power of spectacle lenses.
Product Details
Published: 11/30/2024 ISBN(s): 9780539197860 Number of Pages: 28 File Size: 1 file , 5.8 MB Note: This product is unavailable in Ukraine, Russia, Belarus
