Assessment of the performance of automated focimeters in the measurement of single vision spectacle lenses.

Background: The accuracy and precision of any instrument should not be taken for granted. While there is an international standard for checking focimeters, there is no report of any study on their performance.

Method: A sample set of 51 focimeters (11 brands), were used to measure the spherical power of a set of lenses and the prismatic power of two lenses complying with ISO 9342-1:2005 and other calibrated prismatic lenses and the spherical power of some grey filters.

Impact resistance and prescription compliance with AS/NZS 1337.6:2010.

Background: Australian/New Zealand Standard 1337.6 deals with prescription eye protection and has been in place since 2007. There have been many standards marking licences granted since then.