Optics and optical instruments. Focimeters General purpose instruments

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

31-10-2014

Publisher

British Standards Institution

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

Defines 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 part of ISO8598 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 lens products with the International Standards existing for these lenses.

Committee	CH/172/3
DevelopmentNote	Supersedes BS EN ISO 8598 & 09/30169936 DC. (10/2014)
DocumentType	Standard
Pages	38
PublisherName	British Standards Institution
Status	Current
Supersedes	09/30169936 DC : DRAFT NOV 2009 BS EN ISO 8598:1998

Standards	Relationship
EN ISO 8598-1:2014	Identical
ISO 8598-1:2014	Identical

ISO 21987:2017	Ophthalmic optics — Mounted spectacle lenses
ISO 9342-1:2005	Optics and optical instruments — Test lenses for calibration of focimeters — Part 1: Test lenses for focimeters used for measuring spectacle lenses
ISO 8980-1:2017	Ophthalmic optics — Uncut finished spectacle lenses — Part 1: Specifications for single-vision and multifocal lenses
ISO 9801:2009	Ophthalmic instruments — Trial case lenses
ISO 13666:2012	Ophthalmic optics Spectacle lenses Vocabulary
ISO/IEC Guide 99:2007	International vocabulary of metrology Basic and general concepts and associated terms (VIM)
ISO 8980-2:2017	Ophthalmic optics — Uncut finished spectacle lenses — Part 2: Specifications for power-variation lenses
ISO 7944:1998	Optics and optical instruments — Reference wavelengths
ISO 18369-3:2017	Ophthalmic optics — Contact lenses — Part 3: Measurement methods
ISO/TR 28980:2007	Ophthalmic optics Spectacle lenses Parameters affecting lens power measurement
ISO 8429:1986	Optics and optical instruments Ophthalmology Graduated dial scale

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BS EN ISO 8598-1:2014

Optics and optical instruments. Focimeters General purpose instruments

Table of Contents

Abstract

Scope

General Product Information

International Equivalents

Standards Referencing This Book

Category

Subcategory