BS EN ISO 8598-1:2014
Current
The latest, up-to-date edition.
Optics and optical instruments. Focimeters General purpose instruments
Hardcopy , PDF
English
31-10-2014
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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.
| 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 |
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.
| 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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