EN ISO 8598-1:2014

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Technical requirements for general purpose focimeters
5 Metrological requirements
6 Test procedures
7 Marking
Annex A (informative) - Use of correction values when
        measuring spectacle lenses
Annex B (informative) - Example for evaluation of
        uncertainty of measurement for automated
        focimeters for general use
Annex C (normative) - Specifications of special
        reference lenses
Annex D (informative) - Information for users on the
        performance of general purpose focimeters covered
        by this part of ISO 8598
Bibliography

ISO 8598-1:2014 specifies requirements and test methods for general purpose focimeters designed for the measurement of vertex powers, cylinder axis, prismatic power and prism base setting within a restricted area at a specified location of a lens. This excludes instruments that can only measure the whole lens at once.It is applicable to instruments typically intended for use by the ophthalmic community, with the capability to demonstrate conformity of spectacle lens products with the International Standards existing for these lenses.