60.60 Standard published Jul 19, 2023
CEN
CEN/TC 170 Ophthalmic optics
European Norm
11.040.70 Ophthalmic equipment
Published
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.
WITHDRAWN
EN ISO 9342-1:2005
PUBLISHED
EN ISO 9342-1:2023
60.60
Standard published
Jul 19, 2023