Full Description

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 restricted and cannot be purchased in the following countries Ukraine, Russia, Belarus