EN ISO 21987:2009
(Main)Ophthalmic optics - Mounted spectacle lenses (ISO 21987:2009)
Ophthalmic optics - Mounted spectacle lenses (ISO 21987:2009)
ISO 21987:2009 specifies requirements for mounted spectacle lenses relative to the prescription order.
Augenoptik - Fertig montierte Korrektionsbrillengläser (ISO 21987:2009)
Diese Internationale Norm legt Anforderungen an die Beschaffenheit von Brillengläsern in Korrektionsbrillen relativ zu der zugrunde liegenden Brillengläser-Verordnung fest.
Optique ophtalmique - Verres ophtalmiques montés (ISO 21987:2009)
L'ISO 21987:2009 spécifie les exigences relatives aux verres ophtalmiques de prescription montés.
Očesna optika - Vdelana stekla očal (ISO 21987:2009)
Ta mednarodni standard določa zahteve za vdelana stekla očal glede na recept.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2010
2þHVQDRSWLND9GHODQDVWHNODRþDO ,62
Ophthalmic optics - Mounted spectacle lenses (ISO 21987:2009)
Augenoptik - Fertig montierte Korrektionsbrillengläser (ISO 21987:2009)
Optique ophtalmique - Verres ophtalmiques montés (ISO 21987:2009)
Ta slovenski standard je istoveten z: EN ISO 21987:2009
ICS:
11.040.70 Oftalmološka oprema Ophthalmic equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 21987
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2009
ICS 11.040.70
English Version
Ophthalmic optics - Mounted spectacle lenses (ISO
21987:2009)
Optique ophtalmique - Verres ophtalmiques montés (ISO Augenoptik - Fertig montierte Korrektionsbrillengläser (ISO
21987:2009) 21987:2009)
This European Standard was approved by CEN on 17 September 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21987:2009: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Annex ZA (informative) Relationship between this International Standard and the Essential
Requirements of EU Directive 93/42/EEC .4
Foreword
This document (EN ISO 21987:2009) has been prepared by Technical Committee ISO/TC 172 "Optics and
photonics" in collaboration with Technical Committee CEN/TC 170 “Ophthalmic optics” the secretariat of which
is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by April 2010, and conflicting national standards shall be withdrawn at the
latest by April 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive.
For relationship with EU Directive, see informative Annex ZA, which is an integral part of this document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 21987:2009 has been approved by CEN as a EN ISO 21987:2009 without any modification.
Annex ZA
(informative)
Relationship between this International Standard and the Essential
Requirements of EU Directive 93/42/EEC
This International Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide one means of conforming to Essential Requirements of
the New Approach Directive 93/42/EEC, Medical devices: General.
Once this standard is cited in the Official Journal of the European Union under that Directive and has been
implemented as a national standard in at least one Member State, compliance with the normative clauses of
this standard given in Table ZA.1 confers, within the limits of the scope of this standard, a presumption of
conformity with the corresponding Essential Requirements of that Directive and associated EFTA regulations.
Table ZA.1 - Correspondence between this International Standard and Directive 93/42/EEC
Clause(s)/sub-clause(s) of Essential requirements (ERs) of
Qualifying remarks/Notes
this International Standard EU Directive 93/42/EEC
These ERs are covered by
5.2 1, 2, 3, 4, 6, 6a), 7.1, 9.2, 9.3
normative reference to ISO
14889:2003.
5.3, 5.4, 5.5 3
These ERs are covered by clause 7,
7, 8 13.1, 13.3
and by the normative reference to
ISO 14889:2003 in clause 8.
NOTE ER 13.3.a) is only partly addressed in ISO 14889:2003.
WARNING: Other requirements and other EU Directives may be applicable to the products falling within the
scope of this standard.
INTERNATIONAL ISO
STANDARD 21987
First edition
2009-10-01
Ophthalmic optics — Mounted spectacle
lenses
Optique ophtalmique — Verres ophtalmiques montés
Reference number
ISO 21987:2009(E)
©
ISO 2009
ISO 21987:2009(E)
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ii © ISO 2009 – All rights reserved
ISO 21987:2009(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Classification .2
5 Requirements.2
5.1 Reference temperature .2
5.2 Lenses used in manufacturing complete spectacles .2
5.3 Optical requirements.2
5.4 Thickness tolerance .6
5.5 Positioning tolerances.6
6 Test methods .8
6.1 General .8
6.2 Measurement method for the back vertex power of single-vision lenses and the distance
portion of multifocal and progressive-power lenses and near portion of degressive-power
lenses.8
6.3 Measurement method for cylinder axis.8
6.4 Addition power measurement.8
6.5 Method for measuring position and tilt.10
6.6 Material and surface quality .10
6.7 Prism imbalance (relative prism error) measurement method for pairs of single-vision and
multifocal lenses .10
7 Marking for progressive-power and degressive-power lenses .10
7.1 Permanent marking .10
7.2 Non-permanent marking.11
8 Identification .11
9 Reference to ISO 21987.11
Annex A (informative) Material and surface quality .12
Annex B (informative) Recommendations on mounting.13
Annex C (informative) Alternative methods for measuring prism imbalance (relative prism error)
for pairs of single-vision and multifocal lenses.15
Bibliography.17
ISO 21987:2009(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 21987 was prepared by Technical Committee ISO/TC 172, Optics and photonics, Subcommittee SC 7,
Ophthalmic optics and instruments.
iv © ISO 2009 – All rights reserved
INTERNATIONAL STANDARD ISO 21987:2009(E)
Ophthalmic optics — Mounted spectacle lenses
1 Scope
This International Standard specifies requirements for mounted spectacle lenses relative to the prescription
order.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 7944, Opt
...
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