Foreword

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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;
the terminology related to power-variation lenses that was introduced with ISO 21987^[1^] 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;
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.

1 Scope

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

2 Normative references

3 Terms and definitions

4 Classification

5 Requirements

5.1 General

5.2 Optical requirements for the finished surface

5.3 Geometrical tolerances

5.4 Orientation of the plane of transmission for polarizing blanks

5.5 Packaging

6 Test methods

6.1 General

6.2 Surface power

6.3 Addition power or variation power

6.4 Segment geometry for multifocal blanks

6.5 Material and surface quality

7 Marking and identification

7.1 Marking

7.2 Labelling on the package

7.3 Information to be made available

8 Reference to this document

Bibliography

ISO 10322:2026

Ophthalmic optics. Semi-finished blanks

Current

Published:

16 Apr 2026

Access the British Standard

1 Scope