SIST EN ISO 8980-2:2000

Ophthalmic optics - Uncut finished spectacle lenses - Part 2: Specifications for progressive power lenses (ISO 8980-2:1996)

Specification of minimum requirements which are necessary for a sufficient quality of function.

Augenoptik - Rohkantige fertige Brillengläser - Teil 2: Anforderungen an Gleitsicht-Brillengläser (ISO 8980-2:1996)

Dieser Teil von ISO 8980 legt Anforderungen an die optischen und geometrischen Eigenschaft von rohkantigen fertigen Gleitsicht-Brillengläsern fest.

Optique ophtalmique - Verres de lunettes finis non détourés - Partie 1: Spécifications pour les verres progressifs (ISO 8980-2:1996)

Očesna optika - Nebrušena zglajena stekla očal - 2. del: Specifikacije za progresivna stekla (ISO 8980-2:1996)

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-1999
• Withdrawal Date: 30-Sep-2004
• ICS: 11.040.70 - Ophthalmic equipment
• Technical Committee: VAZ - Healthcare
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 01-Oct-2004
• Due Date: 01-Oct-2004
• Completion Date: 01-Oct-2004
• Ref Project: EN ISO 8980-2:1997 - Ophthalmic optics - Uncut finished spectacle lenses - Part 2: Specifications for progressive power lenses (ISO 8980-2:1996)

Relations

• Replaced By: SIST EN ISO 8980-1:2004 - Ophthalmic optics - Uncut finished spectacle lenses - Part 1: Specifications for single-vision and multifocal lenses (ISO 8980-1:2004)
• Effective Date: 01-Oct-2004
• Replaced By: SIST EN ISO 8980-2:2004 - Ophthalmic optics - Uncut finished spectacle lenses - Part 2: Specifications for progressive power lenses (ISO 8980-2:2004)
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 8980-2:2000
01-januar-2000
2þHVQDRSWLND1HEUXãHQD]JODMHQDVWHNODRþDOGHO6SHFLILNDFLMH]D
SURJUHVLYQDVWHNOD,62
Ophthalmic optics - Uncut finished spectacle lenses - Part 2: Specifications for
progressive power lenses (ISO 8980-2:1996)
Augenoptik - Rohkantige fertige Brillengläser - Teil 2: Anforderungen an Gleitsicht-
Brillengläser (ISO 8980-2:1996)
Optique ophtalmique - Verres de lunettes finis non détourés - Partie 1: Spécifications
pour les verres progressifs (ISO 8980-2:1996)
Ta slovenski standard je istoveten z: EN ISO 8980-2:1997
ICS:
11.040.70 Oftalmološka oprema Ophthalmic equipment
SIST EN ISO 8980-2:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN ISO 8980-2:2000

---------------------- Page: 2 ----------------------

SIST EN ISO 8980-2:2000

---------------------- Page: 3 ----------------------

SIST EN ISO 8980-2:2000

---------------------- Page: 4 ----------------------

SIST EN ISO 8980-2:2000

---------------------- Page: 5 ----------------------

SIST EN ISO 8980-2:2000

---------------------- Page: 6 ----------------------

SIST EN ISO 8980-2:2000
INTERNATIONAL IS0
STANDARD
8980-2
First edition
1996-02-01
Ophthalmic optics - Uncut finished
spectacle lenses -
Part 2:
Specifications for progressive power lenses
Op tique oph talmique - Verres de lunettes finis non d&our& -
Partie 2: Spkcifications pour les verres progressifs
Reference number
IS0 8980-Z: 1996(E)

---------------------- Page: 7 ----------------------

SIST EN ISO 8980-2:2000
IS0 8980-2: 1996(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(I EC) 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 IS0 8980-2 was prepared by Technical Committee
lSO/TC 172, Optics and optical instruments, Subcommittee SC 8,
Ophthalmic optics.
IS0 8980 consists of the following parts, under the general title
Uncut finished spectacle lenses:
Ophthalmic optics -
- Part 7: Specifications for single-vision and multifocal lenses
- Part 2: Specifications for progressive power lenses
- Part 3: Transmittance specifications and test methods
Annexes A and B of this part of IS0 8980 are for information only.
0 IS0 1996
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 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii

---------------------- Page: 8 ----------------------

SIST EN ISO 8980-2:2000
IS0 8980-2: 1996(E)
INTERNATIONAL STANDARD 0 60
- Uncut finished spectacle
Ophthalmic optics
lenses -
Part 2:
Specifications for progressive power lenses
3 Definitions
1 Scope
For the purposes of this part of IS0 8980, the defi-
This part of IS0 8980 specifies requirements for the
nitions given in IS0 13666 apply.
optical and geometrical properties for uncut finished
progressive spectacle lenses.
4 Classification
Finished lenses are classified as follows:
a) single-vision finished lenses;
2 Normative references
b) multifocal finished lenses;
The following standards contain provisions which,
through reference in this text, constitute provisions
c) progressive power finished lenses.
of this part of IS0 8980. At the time of publication, the
editions indicated were valid. All standards are subject
5 Requirements
to revision, and parties to agreements based on this
part of IS0 8980 are encouraged to investigate the
The tolerances shall apply at a temperature of
possibility of applying the most recent editions of the
23 “C + 5 “C.
-
standards indicated below. Members of IEC and IS0
maintain registers of currently valid International
Standards. 5.1 Optical requirements
IS0 7944:1984, Optics and optical instruments -
5.1 .l General
Reference wavelengths.
The optical tolerances shall apply at the reference
Optics and optical instruments -
I SO 8598:-l’,
points of the lens at one of the reference wavelengths
Focime ters.
specified in IS0 7944.
IS0 8980-I :I 996, Ophthalmic optics - Uncut fin-
The as-worn position can result in the apparent power
ished spectacle lenses - Part 1: Specifications for
to the eye being different from that determined as a
single-vision and multifocal lenses.
result of the focimeter measurement.
Ophthalmic optics - Spectacles If the manufacturer has applied corrections to com-
I SO 13666:--l’,
pensate for the as-worn position, then the tolerances
lenses - Vocabulary.
1) To be published.
1

---------------------- Page: 9 ----------------------

SIST EN ISO 8980-2:2000
0 IS0
IS0 8980-2: 1996(E)
The optical power shall be determined using a
shall apply to the corrected value and this corrected
focimeter complying with IS0 8598 or an equivalent
value shall be stated by the manufacturer on the
method.
package or in an accompanying document (see 8.1).
The measured addition power is principally influenced
5.1.2.1 Tolerances on the power of the lenses
by the prescribed surface. In particular cases, e.g.
oblique cylinders or high minus powers, the deviation
Spherical, aspherical and cylindrical power lenses shall
of the measured addition power of finished progress-
comply with the tolerances on each meridian, A, and
ive lenses can exceed the above mentioned toler-
with the tolerances on the cylinder, B (see table I).
ances. The manufacturer shall submit corrected
values on request (see 8.2).
5.1.2.2 Tolerances on the direction of cylinder
axis
5.1.2 Tolerances on the power of progressive
The tolerances on the direction of cylinder axis as
power lenses for the distance portion (back vertex
specified in table2 shall be measured using the
power)
method described in 6.2.
Table 1 - Tolerances on the power of lenses
Values in dioptres (D)
Power of meridian with
highest absolute power
Table 2 - Tolerances on the direction of cylinder axis
2

---------------------- Page: 10 ----------------------

SIST EN ISO 8980-2:2000
5.1.4 Tolerances on optical centration and
5.1.3 Tolerances on the addition power
prismatic power
Within the areas centred around the design reference
point there shall be a point at which the difference
between the prescribed and/or the thickness re-
The tolerances on the addition power as specified in
duction prism and the measured prismatic power
table3 shall be measured by the method described in
does not exceed the values given in table4.
62 . .
Table 3 - Tolerances on the addition power
Values in dioptres (D)
< 4,00 > 4,00
Value of the addition power
+ 0,12 + 0,18
Tolerance -
Tolerances on optical centration and prismatic power
Table 4 -
Prismatic power (A)
NOTES
1 The prismatic power specified in table4 includes the combination of prescribed prism
and any prism thinning.
2 The total prismatic tolerance at the prism reference point is the sum of the prismatic
component resulting from the decentration tolerance (Prentice’s rule) and the above toler-
ance on the prismatic power.
3

---------------------- Page: 11 ----------------------

SIST EN ISO 8980-2:2000
IS0 8980~2:1996( E)
5.1.5 Tolerances on the base setting of prism 6 Test methods
The tolerances on the base setting of any prism shall
be determined by verifying that the horizontal and
6.1 Cylinder axis and prism base setting
vertical components comply with table 4.
measurement method
Measure the cylinder axis and prism base setting in
relation to the horizontal determined by the manufac-
Geometrical tolerances turer’s permanent alignment reference markings.
52 .
Tolerances on the size of finished lenses
5.2.1
6.2 Addition power measurement method
Lens sizes are classified as follows:
Place the lens so that the progressive surface is
against the focimeter lens support and c
...