SIST EN ISO 10322:2026

Ophthalmic optics - Semi-finished blanks (ISO 10322:2026)

This document specifies requirements for the optical and geometrical properties of semi-finished blanks.

Augenoptik - Einseitig fertige Brillenglasblanks (ISO 10322:2026)

Dieses Dokument legt Anforderungen an die optischen und geometrischen Eigenschaften von einseitig fertigen Brillenglasblanks fest.

Optique ophtalmique - Verres de lunettes semi-finis (ISO 10322:2026)

Le présent document spécifie les exigences relatives aux propriétés optiques et géométriques des verres semi‑finis.

Očesna optika - Napol izdelana stekla očal (ISO 10322:2026)

Ta dokument določa zahteve za optične in geometrijske lastnosti polizdelkov.

General Information

• Status: Published
• Public Enquiry End Date: 30-May-2025
• Publication Date: 17-May-2026
• ICS: 11.040.70 - Ophthalmic equipment
• Technical Committee: VAZ - Healthcare
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 07-May-2026
• Due Date: 12-Jul-2026
• Completion Date: 18-May-2026
• Ref Project: EN ISO 10322:2026 - Ophthalmic optics - Semi-finished blanks (ISO 10322:2026)

Relations

• Replaces: SIST EN ISO 10322-1:2016 - Ophthalmic optics - Semi-finished spectacle lens blanks - Part 1: Specifications for single-vision and multifocal lens blanks (ISO 10322-1:2016)
• Effective Date: 01-Jun-2026
• Replaces: SIST EN ISO 10322-2:2016 - Ophthalmic optics - Semi-finished spectacle lens blanks - Part 2: Specifications for progressive-power and degressive-power lens blanks (ISO 10322-2:2016)
• Effective Date: 01-Jun-2026

Overview

kSIST FprEN ISO 10322:2026 - Ophthalmic optics - Semi-finished blanks (ISO 10322:2026) - published by CEN, establishes standardized criteria for the optical and geometrical properties of semi-finished blanks used in ophthalmic optics, specifically for the production of spectacle lenses. This international standard benefits manufacturers, laboratories, and regulatory agencies by ensuring consistency, safety, and quality in the production and supply chain of semi-finished ophthalmic blanks.

Key Topics

• Scope and Classification

  • Defines requirements for optical and geometrical properties of semi-finished blanks for ophthalmic lenses.
  • Classifies blanks by finished surface types:
    • Spherical
    • Aspherical, toroidal, and atoroidal
    • Multifocal
    • Power-variation

• Optical Requirements

  • Specifies tolerances for surface power, cylindrical power, and addition/variation power.
  • Outlines procedures for verifying surface uniformity over specified zones and measuring at reference points using appropriate instruments.

• Geometrical Tolerances

  • Details tolerances for sizes (nominal, actual, and usable), center and edge thickness, and segment dimensions for multifocal blanks.
  • Sets requirements for the position and alignment of segments, especially important in matching left and right blanks.

• Marking and Identification

  • Stipulates marking requirements for orientation, permanent and non-permanent alignment marks, and necessary package labeling, including power, dimensions, material, and manufacturer identification.

• Testing and Verification

  • Describes accepted measurement and inspection methods, including reflection and transmission methods, and calibrations tied to refractive index standards.

Applications

kSIST FprEN ISO 10322:2026 is highly relevant for:

• Ophthalmic Lens Manufacturers: Ensures blanks meet quality requirements before further processing or finishing, facilitating reliable downstream manufacturing of single-vision, multifocal, and progressive spectacle lenses.
• Quality Assurance Labs: Provides standardized test methods and tolerances for verifying compliance with international quality benchmarks.
• Optical Wholesalers and Distributors: Ensures proper labeling, identification, and consistent quality across product lines, enabling traceability and facilitating regulatory compliance.
• Custom and High-Precision Lens Production: Supports the use of advanced technology (such as freeform surfacing) where accurate, high-quality semi-finished blanks enable production of a wide variety of optical lens designs.
• Import/Export Compliance: Assists stakeholders in demonstrating conformity to international and European market requirements, streamlining cross-border trade.

Related Standards

• ISO 14889: Fundamental requirements for uncut finished lenses, referenced directly in kSIST FprEN ISO 10322:2026.
• ISO 7944: Reference wavelengths for optical measurements.
• ISO 13666: Terminology for spectacle lens production and testing.
• ISO 8598-1: General purpose focimeters for verifying lens performance.
• ISO 8980-1 and ISO 8980-2: Related to addition power and variation power measurement procedures.
• ISO/TR 28980: Addresses non-linearity and precision errors in measurement tools.

Practical Value

Adopting kSIST FprEN ISO 10322:2026 ensures:

• Consistency in Manufacturing: Aligns global production practices for semi-finished ophthalmic blanks, reducing variability and enhancing product quality.
• Improved Traceability: Comprehensive marking and labeling aid in identification, inventory management, and recall processes.
• Enhanced Patient Safety: Strict tolerances guarantee lenses fabricated from compliant blanks will deliver the intended performance characteristics.
• Market Access: Standards compliance is crucial for successful certification and international distribution.

By adhering to kSIST FprEN ISO 10322:2026, the ophthalmic industry secures a foundation of quality and reliability for the delivery of vision correction products worldwide.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2026
Nadomešča:
SIST EN ISO 10322-1:2016
SIST EN ISO 10322-2:2016
Očesna optika - Napol izdelana stekla očal (ISO 10322:2026)
Ophthalmic optics - Semi-finished blanks (ISO 10322:2026)
Augenoptik - Einseitig fertige Brillenglasblanks (ISO 10322:2026)
Optique ophtalmique - Verres de lunettes semi-finis (ISO 10322:2026)
Ta slovenski standard je istoveten z: EN ISO 10322:2026
ICS:
11.040.70 Oftalmološka oprema Ophthalmic equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 10322
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2026
EUROPÄISCHE NORM
ICS 11.040.70 Supersedes EN ISO 10322-1:2016, EN ISO 10322-
2:2016
English Version
Ophthalmic optics - Semi-finished blanks (ISO
10322:2026)
Optique ophtalmique - Verres semi-finis (ISO Augenoptik - Einseitig fertige Brillenglasblanks (ISO
10322:2026) 10322:2026)
This European Standard was approved by CEN on 23 April 2026.

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-CENELEC 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-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10322:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 10322:2026) 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 October 2026, and conflicting national standards shall
be withdrawn at the latest by October 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 10322-1:2016 and EN ISO 10322-2:2016.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 10322:2026 has been approved by CEN as EN ISO 10322:2026 without any modification.

International
Standard
ISO 10322
First edition
Ophthalmic optics — Semi-finished
2026-04
blanks
Optique ophtalmique — Verres semi-finis
Reference number
ISO 10322:2026(en) © ISO 2026
ISO 10322:2026(en)
© ISO 2026
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 10322:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 1
5 Requirements . 2
5.1 General .2
5.2 Optical requirements for the finished surface .2
5.2.1 General .2
5.2.2 Surface power .2
5.2.3 Uniformity of the surface power of spherical single-surface-power blanks and
multifocal blanks .3
5.2.4 Surface addition power for multifocal blanks and variation power for power-
variation blanks .3
5.3 Geometrical tolerances .4
5.3.1 Classification of, and tolerances on, the sizes .4
5.3.2 Thickness .5
5.3.3 Segment geometry for multifocal blanks .5
5.4 Orientation of the plane of transmission for polarizing blanks .6
5.5 Packaging .6
6 Test methods . 6
6.1 General .6
6.2 Surface power .6
6.3 Addition power or variation power .7
6.3.1 General .7
6.3.2 Addition power for multifocal blanks .7
6.3.3 Variation power for blanks with power-variation surfaces .9
6.4 Segment geometry for multifocal blanks.9
6.5 Material and surface quality .9
7 Marking and identification . 9
7.1 Marking .9
7.1.1 Blanks with spherical and aspherical surfaces . .9
7.1.2 Blanks with power-variation surfaces .9
7.2 Labelling on the package .10
7.2.1 All type of blanks .10
7.2.2 Multifocal blanks.10
7.2.3 Power-variation blanks .10
7.3 Information to be made available .11
8 Reference to this document.11
Annex A (informative) Material and surface quality .12
Annex B (informative) Conversion of surface power and surface power tolerances from the
refractive index of the blank to that of an instrument's fixed reference .13
Bibliography .16

iii
ISO 10322:2026(en)
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 172, Optics and photonics, Subcommittee SC 7,
Ophthalmic optics and instruments, in collaboration with the European Committee for Standardization
(CEN) Technical Committee CEN/TC 170, Ophthalmic optics, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
This first edition of ISO 10322 cancels and replaces the fourth edition of ISO 10322-1:2016 and
ISO 10322-2:2016, which have been combined and technically revised.
The main changes are as follows:
— the two original parts of the International Standard have been combined;
— blanks have been classified by the type of finished surface, not by their intended use, since what were
termed single-vision blanks are now also used to make multifocal or power-variation surfaces by using
free form technology;
[1]
— the terminology related to power-variation lenses that was introduced with ISO 21987 has been
adopted to avoid the separate descriptions necessary for progressive-power and degressive power
blanks;
— in 5.1, a cross reference has been made to the requirements on the material of the blank that are in
ISO 14889;
— the tables giving the spherical power and cylindrical power tolerances are now both in the same
subclause, and the tolerances for cylindrical powers between 0,00 D and ≤0,25 D have been transferred
to the cylindrical power tolerance table;
— blank size: effective size is now called actual size and the tolerances for actual and usable sizes changed;
— the default position for the distance power measurement when measuring the addition power for
multifocal blanks has been moved to the geometrical centre of the blank;

iv
ISO 10322:2026(en)
— the text on addition power and variation power measurement has been made more similar to that
in ISO 8980-1 and ISO 8980-2, where appropriate (these two standards are also being revised and
combined).
Any feedback or questions on this document should be directed to the user’s national standards body.
A complete listing of these bodies can be found at www.iso.org/members.html.

v
International Standard ISO 10322:2026(en)
Ophthalmic optics — Semi-finished blanks
1 Scope
This document specifies requirements for the optical and geometrical properties of semi-finished blanks.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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, Optics and photonics — Reference wavelengths
ISO 8598-1, Optics and optical instruments — Focimeters — Part 1: General purpose instruments
ISO 13666, Ophthalmic optics — Spectacle lenses — Vocabulary
ISO 14889:2025, Ophthalmic optics — Spectacle lenses — Fundamental requirements for uncut finished lenses
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 13666 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
single-surface-power blank
blank with the finished surface having a single nominal surface power
Note 1 to entry: This includes blanks with spherical, aspherical, cylindrical and atoroidal surfaces.
[SOURCE: ISO 13666:2019, 3.8.2 – modified, ”spherical”, “cylindrical” and “and atoroidal” have been added to
Note 1 to entry.]
4 Classification
Semi-finished blanks (shortened to blanks in the remainder of this document for easier reading) shall be
classified according to the finished surface as follows:
a) single-surface-power blanks;
b) multifocal blanks;
c) power-variation blanks.
ISO 10322:2026(en)
5 Requirements
5.1 General
The tolerances shall apply at a temperature of (23 ± 5) °C.
The material of the blank shall comply with ISO 14889:2025, 4.3.1 and 4.3.2.
5.2 Optical requirements for the finished surface
5.2.1 General
The optical tolerances shall apply to the manufacturer’s stated values at the reference points of the blank at
one of the two reference wavelengths specified in ISO 7944.
The reference point or points shall be specified by the manufacturer. If no reference point is specified, the
blank's geometrical centre is assumed to be the reference point.
The power ranges and tolerances in Tables 1, 2, 3 and 4 are expressed as surface power values in the
refractive index of the material of the blank being measured.
5.2.2 Surface power
5.2.2.1 Single-surface-power blanks and multifocal blanks
The tolerances on the intended surface spherical power of single-surface-power blanks and multifocal
blanks as specified in Table 1 shall apply at the reference point and shall be measured using the method
described in 6.2; see also Annex B.
Table 1 — Tolerances on the surface spherical power of single-surface-power and multifocal blanks
All values are given in dioptres (D) in the refractive index of the material
ab
Nominal surface power
ab
Tolerance on surface power
(absolute value)
≥0,00 and ≤2,00 ±0,09
>2,00 and ≤10,00 ±0,06
>10,00 and ≤15,00 ±0,09
>15,00 and ≤20,00 ±0,12
>20,00 ±0,25
a
For blanks that have an absolute surface cylindrical power in the range ≥0,00 and <0,25 D,
these nominal surface powers and the tolerances apply to the absolute value of the mean sphere:
FF+
, where F and F are the surface powers of the principal meridians.
1 2
b
For blanks that have an absolute surface cylindrical power ≥0,25 D, these nominal surface
powers and the tolerances apply to the principal meridian of lower absolute power.
The tolerances on the intended surface cylindrical power, including surfaces intended to have no cylindrical
power, as specified in Table 2 shall apply at the reference point and shall be measured using the method
described in 6.2; see also Annex B.

ISO 10322:2026(en)
Table 2 — Tolerances on the surface cylindrical power of single-surface-power and multifocal
blanks
All values are given in dioptres (D) in the refractive index of the material
Cylindrical power Absolute mean spherical surface Tolerance on surface
(absolute value) power cylindrical power
≤15,00 ±0,06
≥0,00 and < 0,25
>15,00 ±0,08
≥0,25 and ≤4,00 ±0,06
>4,00 and ≤6,00 All or the like ±0,09
>6,00 ±0,12
5.2.2.2 Power-variation blanks
The tolerances on the surface power of blanks with power-variation surfaces as specified in Table 3 shall
apply at the primary reference point and shall be measured using the method described in 6.2; see also
Annex B.
Table 3 — Tolerances on the surface power at the primary reference point of power-variation
blanks
All values are given in dioptres (D) in the refractive index of the material
Tolerance on surface
Tolerance on the surface mean sphere
a
cylindrical power
Nominal surface power
FF+
FF−
≥0,00 and ≤10,00 ±0,09 0,09
>10,00 and ≤15,00 ±0,12 0,12
NOTE F and F are the surface powers of the principal meridians.
1 2
a
Relative to zero, or to any intended surface cylindrical power of the blank's design.
5.2.3 Uniformity of the surface power of spherical single-surface-power blanks and multifocal
blanks
Over a zone of 40 mm diameter centred around the reference point, the surface power of blanks with
spherical surfaces shall not deviate by more than 0,06 D from the surface power measured at the reference
point.
For multifocal blanks, this excludes the area of the segment and around the dividing line where this
interferes with the measurement.
The uniformity shall be determined using a suitable instrument and the method described in 6.2.
5.2.4 Surface addition power for multifocal blanks and variation power for power-variation blanks
The tolerances on the addition power or variation power as specified in Table 4 shall apply at the reference
points and shall be measured using the method described in 6.3; see also Annex B.
This subclause applies to power-variation blanks only if they have both a primary and a secondary reference
point.
ISO 10322:2026(en)
Table 4 — Tolerances on the surface addition power or variation power
All values are given in dioptres (D) in the refractive index of the material
Surface addition power Tolerance
or variation power
≤4,00 ±0,12
>4,00 ±0,18
5.3 Geometrical tolerances
5.3.1 Classification of, and tolerances on, the sizes
The sizes are classified and tolerances applied as given in Table 5.
Table 5 — Classification of sizes and tolerances for blanks
Tolerance
a
Name Symbol Classification
mm
Nominal size d The label or packaging value No tolerance applied
n
20,
Actual size d The largest physical diameter of the blank
a
10,
The diameter of the blank that the manufacturer states
20,
Usable size d
u
10,
is usable
a
These symbols are given to help in interpretation of this subclause, not for general use.
The tolerance on usable size does not apply to blanks for lenses with a carrier, such as lenticulars.
For blanks that are intentionally not round, or that have different horizontal and vertical dimensions, the
manufacturer shall state the equivalent sizes for the horizontal and vertical dimensions, separated by '×'.
NOTE This typically applies to elliptical shaped blanks. It also applies to polarizing blanks with notches indicating
the intended horizontal orientation of the lens, where the notching can res
...