Standard

ISO 9342-1:2023

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Note: This standard has a new edition: ISO 9342-1:2023

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Abstract

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.

Document information

  • Standard from ISO
  • Published:
  • Expires:
  • Edition: 2
  • Version: 1
  • Document type: IS
  • ICS 11.040.70
  • ISO TC ISO/TC 172/SC 7

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