SIST EN ISO 12867:2000
(Main)Ophthalmic instruments - Trial frames (ISO 12867:1998)
Ophthalmic instruments - Trial frames (ISO 12867:1998)
Specification of quality requirements for the frame of trial spectacles
Ophthalmische Instrumente - Refraktionsbrillen (ISO 12867:1998)
Diese Internationale Norm legt zusammen mit ISO 15004 Mindestanforderungen und Prüfverfahren für Refraktionsbrillen fest, mit denen Refraktionsgläser nach ISO 9801 vor den Augen eines Prüflings gehaltert werden, um die Sehschärfe zu bestimmen und eine optische Korrektion des Sehens zu ermöglichen. Diese Internationale Norm gilt auch für Glashalter an Kopfbändern, Brillen an Wandarmen und Brillen in der Art von Korrektionsbrillen mit Auflagen an den Ohren und am Nasensattel. Sie gilt für alle Typen von Refraktionsbrillen einschließlich Halbrand- und drehbaren Glashaltern.
Instruments ophtalmiques - Montures d'essai (ISO 12867:1998)
Spécifie la procédure d'essai et la prescription de comportement, incluant une recommandation pour la durée d'application de la flamme, concernant des câbles électriques de données devant conserver l'intégrité du circuit lorsqu'ils sont soumis à un incendie dans des conditions spécifiées. Décrit les moyens de préparation des échantillons, les dispositifs de contrôle de la continuité, la procédure d'essai électrique, la méthode pour brûler les câbles et indique les prescriptions pour évaluer les résultats d'essai. Elle concerne les câbles électriques de données qui n'ont
pas de tension assignée et qui sont utilisés pour des circuits à très basse tension. A le statut d'une publication groupée de sécurité conformément au Guide 104 de la CEI.
Oftalmični instrumenti - Poskusni okviri 12867:1998)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 12867:2000
01-januar-2000
2IWDOPLþQLLQVWUXPHQWL3RVNXVQLRNYLUL
Ophthalmic instruments - Trial frames (ISO 12867:1998)
Ophthalmische Instrumente - Refraktionsbrillen (ISO 12867:1998)
Instruments ophtalmiques - Montures d'essai (ISO 12867:1998)
Ta slovenski standard je istoveten z: EN ISO 12867:1998
ICS:
11.040.70 Oftalmološka oprema Ophthalmic equipment
SIST EN ISO 12867:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 12867:2000
INTERNATIONAL ISO
STANDARD 12867
First edition
1998-06-15
Ophthalmic instruments — Trial frames
Instruments ophtalmiques — Montures d'essai
A
Reference number
ISO 12867:1998(E)
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SIST EN ISO 12867:2000
ISO 12867:1998(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.
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.
International Standard ISO 12867 was prepared by Technical Committee
ISO/TC 172, Optics and optical instruments, Subcommittee SC 7,
Ophthalmic optics and instruments.
Annex A is for information only.
© ISO 1998
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
ii
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SIST EN ISO 12867:2000
©
INTERNATIONAL STANDARD ISO ISO 12867:1998(E)
Ophthalmic instruments — Trial frames
1 Scope
This International Standard, together with ISO 15004, specifies minimum requirements and test methods for trial
frames for holding trial case lenses complying with ISO 9801 in front of a subject's eyes in order to assess visual acuity
and facilitate optical correction of vision.
This International Standard is applicable to lens holders mounted on headbands, bracket-mounted frames and frames
mounted in the manner of spectacles with supports on the ears and the bridge of the nose. It is applicable to all types of
trial frames, including half-eye and rotating lens holders.
1)
This International Standard is not applicable to refractor heads (see ISO 10341 ).
This International Standard takes precedence over ISO 15004, if differences exist.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision,
and parties to agreements based on this International Standard are encouraged to investigate the possibility of
applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of
currently valid International Standards.
ISO 8429:1986, Optics and optical instruments — Ophthalmology — Graduated dial scale.
ISO 9801:1997, Ophthalmic instruments — Trial case lenses.
ISO 15004:1997, Ophthalmic instruments — Fundamental requirements and test methods.
3 Definitions
For the purposes of this International Standard, the following definitions apply.
3.1
trial frame
frame consisting of two interconnected lens holders and means for holding them in a required position in front of the
subject's eyes
————————
1) ISO 10341:1997, Ophthalmic instruments — Refractor heads.
1
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SIST EN ISO 12867:2000
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ISO 12867:1998(E) ISO
3.2
reduced-aperture trial frame
trial frame designed to hold reduced-aperture trial lenses
3.3
full-aperture trial frame
trial frame designed to hold both full-aperture trial lenses and reduced-aperture trial lenses
3.4
half-eye trial frame
trial frame whose lens holders consist of the lower half-segment only and which are designed to hold full- or reduced-
aperture trial lenses
3.5
lens holder
unit designed to hold a number of trial case lenses in front of one eye
3.6
bridge piece
part of the mounting which supports the trial frame on, and part of which is in contact with, the subject's nose
3.7
side
part of the trial frame which uses the subject's ear to retain the frame against the face
4 Requirements
4.1 General
The trial frame shall conform to the requirements specified in ISO 15004, except clauses 5 and 6 of ISO 15004:1997
(environmental conditions and particular requirements for active ophthalmic instruments).
4.2 Mechanical requirements
The trial frame shall conform to the requirements specified in 4.2.1 to 4.2.9.
These requirements are verified as specified in clause 5.
4.2.1 Lens holders
The trial frame shall have the means to position each of two lens holders, one before each eye of the subject. Each
lens holder shall have the means to retain in position a combination of at least three lenses, each in a separate
compartment spaced along the geometrical axis of the lens holder.
4.2.2 Interpupillary distance
The spacing of the centres of the lens holders shall be adjustable to coincide with the interpupillary distance, and to
maintain the l
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