SIST EN ISO 9337-1:2000
(Main)Contact lenses - Determination of back vertex power - Part 1: Method using focimeter with manual focusing (ISO 9337-1:1999)
Contact lenses - Determination of back vertex power - Part 1: Method using focimeter with manual focusing (ISO 9337-1:1999)
Specification of a uniform test procedure in order to achieve comparable test results.
Kontaktlinsen - Bestimmung des bildseitigen Scheitelbrechwertes - Teil 1: Verfahren unter Verwendung eines manuell einzustellenden Scheitelbrechwert-Messgerätes (ISO 9337-1:1999)
Dieser Teil von ISO 9337-1 beschreibt Prüfverfahren für die Bestimmung des bildseitigen Scheitelbrechwertes sowohl von formstabilen Kontaktlinsen als auch von Hydrogel-Kontaktlinsen in Luft unter Verwendung eines manuell einzustellenden Scheitelbrechwert-Meßgerätes. Er gilt für fertige Kontaktlinsen.
Lentilles de contact - Détermination de la puissance frontale arriere - Partie 1: Méthode utilisant un frontofocometre a mise au point manuelle (ISO 9337-1:1999)
La CEI 61340-4-7:2010 fournit des méthodes et des modes opératoires d'essai pour évaluer et choisir le matériel et les systèmes d'ionisation de l'air (ioniseurs). Cette norme établit des techniques de mesure, dans des conditions spécifiées, pour déterminer la tension de décalage (équilibre ionique) et le temps de décharge (neutralisation des charges) pour les ioniseurs. La présente norme ne comporte pas de mesure d'interférences électromagnétiques (EMI) ou l'utilisation d'ioniseurs en relation avec des éléments pyrotechniques, inflammables, explosifs ou des dispositifs explosifs amorcés électriquement.
Contact lenses - Determination of back vertex power - Part 1: Method using focimeter with manual focusing (ISO 9337-1:1999)
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Contact lenses - Determination of back vertex power - Part 1: Method using focimeter with manual focusing (ISO 9337-1:1999)Kontaktlinsen - Bestimmung des bildseitigen Scheitelbrechwertes - Teil 1: Verfahren unter Verwendung eines manuell einzustellenden Scheitelbrechwert-Messgerätes (ISO 9337-1:1999)Lentilles de contact - Détermination de la puissance frontale arriere - Partie 1: Méthode utilisant un frontofocometre a mise au point manuelle (ISO 9337-1:1999)Contact lenses - Determination of back vertex power - Part 1: Method using focimeter with manual focusing (ISO 9337-1:1999)11.040.70Oftalmološka opremaOphthalmic equipmentICS:Ta slovenski standard je istoveten z:EN ISO 9337-1:2000SIST EN ISO 9337-1:2000en01-november-2000SIST EN ISO 9337-1:2000SLOVENSKI
STANDARD
SIST EN ISO 9337-1:2000
SIST EN ISO 9337-1:2000
SIST EN ISO 9337-1:2000
SIST EN ISO 9337-1:2000
SIST EN ISO 9337-1:2000
AReference numberISO 9337-1:1999(E)INTERNATIONALSTANDARDISO9337-1First edition1999-05-01Contact lenses — Determination of backvertex power —Part 1:Method using focimeter with manual focusingLentilles de contact — Détermination de la puissance frontale arrière —Partie 1: Méthode utilisant un frontofocomètre à mise au point manuelleSIST EN ISO 9337-1:2000
ISO 9337-1:1999(E)©
ISO 1999All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronicor mechanical, including photocopying and microfilm, without permission in writing from the publisher.International Organization for StandardizationCase postale 56 · CH-1211 Genève 20 · SwitzerlandInternetiso@iso.chPrinted in SwitzerlandiiContents1 Scope.12 Normative references.13 Terms and definitions.14 Determination of back vertex power.24.1 Principle.24.2 Apparatus and reagent.24.3 Conditioning of lenses prior to testing.34.4 Procedure.34.4.1 Calibration.34.4.2 Measurement of back vertex power of rigid contact lenses.44.4.3 Measurement of back vertex power of hydrogel contact lenses.45 Expression of results.46 Precision data.47 Test report.5Annex A (informative)
Precision data.6Bibliography.8SIST EN ISO 9337-1:2000
© ISOISO 9337-1:1999(E)iiiForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISOmember bodies). The work of preparing International Standards is normally carried out through ISO technicalcommittees. Each member body interested in a subject for which a technical committee has been established hasthe right to be represented on that committee. International organizations, governmental and non-governmental, inliaison with ISO, also take part in the work. ISO collaborates closely with the International ElectrotechnicalCommission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.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 9337-1 was prepared by ISO/TC 172, Optics and optical instruments, SubcommitteeSC 7, Ophthalmic optics and instruments.ISO 9337 consists of the following parts, under the general title Contact lenses — Determination of back vertexpower:¾ Part 1: Method using focimeter with manual focusing¾ Part 2: Measurement on contact lenses immersed in saline.SIST EN ISO 9337-1:2000
ISO 9337-1:1999(E)© ISOivIntroductionIt is intended that the test methods described in this part of ISO 9337 be used by contact lens manufacturers,practitioners and other interested parties.The method as applied to rigid contact lenses does not differentiate between contact lenses which are stored wetand those which are stored dry. The test procedure allows for wet storage by specifying that wet contact lensesrequire blotting before measurement. It is considered that the measured value of back vertex power of rigid contactlenses is not influenced by wet storage.It has been assumed in drafting this part of ISO 9337 that the execution of its provisions will be entrusted toappropriately qualified and experienced people.SIST EN ISO 9337-1:2000
INTERNATIONAL STANDARD
© ISOISO 9337-1:1999(E)1Contact lenses — Determination of back vertex power —Part 1:Method using focimeter with manual focusing1 ScopeThis part of ISO 9337 describes test methods for the determination of back vertex power of both rigid and hydrogelcontact lenses in air using a focimeter with manual focusing. It is applicable to finished contact lenses.2 Normative referencesThe following normative documents contain provisions which, through reference in this text, constitute provisions ofthis part of ISO 9337. For dated references, subsequent amendments to, or revisions of, any of these publicationsdo not apply. However, parties to agreements based on this part of ISO 9337 are encouraged to investigate thepossibility of applying the most recent editions of the normative documents indicated below. For undatedreferences, the latest edition of the normative document referred to applies. Members of ISO and IEC maintainregisters of currently valid International Standards.ISO 8320-1, Contact lenses and contact lens care products — Vocabulary — Part 1: Contact lenses.ISO 10344, Ophthalmic optics — Contact lenses — Saline solution for contact lens testing.3 Terms and definitionsFor the purposes of this part of ISO 9337, the terms and definitions given in ISO 8320-1 apply, together with thefollowing.3.1back vertex powerF'vreciprocal of the paraxial value of the back vertex focal length, measured in metres3.2dioptreDunit of focusing power of a lens or surface, or of the vergence (refractive index divided by the radius) of a wavefrontNOTE 1Commonly used symbols for dioptre are D, dpt and d.NOTE 2Dioptre is expressed in reciprocal metres (m-1).3.3repeatabilitycloseness of agreement between mutually independent test results obtained under repeatability conditions[ISO 3534-1]SIST EN ISO 9337-1:2000
ISO 9337-1:1999(E)© ISO23.4repeatability conditionsconditions where mutually independent test results are obtained with the same method on identical test material inthe same laboratory by the same operator using the same equipment within short intervals of time[ISO 3534-1]3.5repeatability valuervalue below which the absolute difference between two single test results obtained under repeatability conditionsmay be expected to lie with a probability of 95 %[ISO 3534-1]3.6reproducibilitycloseness of agreement between mutually independent test results obtained under reproducibility conditions[ISO 3534-1]3.7reproducibility conditionsconditions where mutually independent test results are obtained with the same
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