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ILNAS-EN ISO 9342-1:2023 Edition 07/2023
Optics and optical instruments - Test lenses for calibration of focimeters - Part 1: Reference lenses for focimeters used for measuring spectacle lenses (ISO 9342-1:2023)
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This document specifies requirements for reference lenses for the calibration and verification of focimeters that are used for the measurement of spectacle form lenses, e.g. those complying with ISO 8598-1. It also gives a method for the determination of the back vertex power of the reference lenses. NOTE            It is accepted that other reference lenses can also be used with powers within the given range, manufactured to the same standard of accuracy and form, but different back vertex powers. However, only lenses with integer nominal powers, as described in 4.1, can be used for the calibration of digitally-rounding focimeters.


Standard - Active


Technical Committee :
CEN/TC 170 : Ophthalmic optics


start of the vote on the project    09/06/2022   date of ratification (dor)    07/07/2023
end of the vote on the project    02/09/2022   date of anouncement (doa)    31/10/2023
start of the vote on the final project    13/04/2023   date of publication (dop)    31/01/2024
end of the vote on the final project    06/06/2023   date of withdrawal (dow)    31/01/2024

Publication Official Journal
of the Grand-Duchy of Luxembourg


Relations to older standards
ILNAS-EN ISO 9342-1:2005

Relations to international standards
ISO 9342-1:2023 
ISO 9342-1 

International Classification for Standards (ICS codes) :

11.040.70 : Ophthalmic equipment


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