ANSI Z80.9 2010

ANSI Z80.9 2010

ANSI Z80.9 2010

ANSI Z80.9 2010 – Ophthalmics – Devices for Low Vision
American National Standards Institute / 13-May-2010 / 22 pages

This ANSI Z80.9 2010 Standard applies to optical and electro-optical devices specified by the manufacturer for use by visually impaired persons as low-vision devices. It specifies optical and mechanical requirements and test methods. It includes devices with optical and/or electrical and/or electronic components used for image capture or display.

ANSI Z80.9 2010 Revision of ANSI Z80.9 2004
American National Standard for Ophthalmics Devices for Low Vision Secretariat The Vision Council
Approved May 13, 2010
American National Standards Institute, Inc.

Contents of ANSI Z80.9 2010
Page
Foreword …………….. iii
1 Scope…… 1
2 Normative references….. 1
3 Terms and definitions….. 1
4 Classification……………… 4
5 Requirements…………….. 5
5.1 Optical devices…………… 5
5.1.1 Spatial resolution ……….. 5
5.1.2 Equivalent power – magnifiers…………… 5
5.1.3 Angular Magnification – telescopes ……. 5
5.1.4 Field of view………………. 5
5.1.5 Lateral variation of magnification ………. 6
5.1.6 Transmittance ……………. 6
5.1.7 Materials and construction ……………….. 6
5.2 Electro-optical devices … 7
5.2.1 Image characteristics….. 7
5.2.2 Materials and construction ……………….. 7
5.2.3 Electrical . 8
6 Environmental conditions of use……….. 8
7 Test methods …………….. 9
7.1 Equivalent power – Magnifiers…………… 9
7.2 Angular magnification – Telescopes…… 9
7.3 Display magnification test – electro-optical devices ….. 9
7.4 Spatial resolution test….. 9
7.4.1 Optical devices…………… 9
7.4.2 Electro-optical devices . 12
7.5 Test for the determination of lateral variation of magnification ………. 13
7.6 Field of view……………… 13
8 Marking, packaging and instructions for use………….. 13
8.1 Marking .. 13
8.2 Documentation………….. 13

Tables of ANSI Z80.9 2010
1 Magnifiers/Near telescopes ………………. 6
2 Distance telescopes…….. 6
3 Environmental conditions of use ………… 8

Figures – ANSI Z80.9 2010
1 Example for an optotype with Ronchi rulings………….. 10
2 Example for a test set-up for near-vision devices……. 10
3 Example for a test set-up for telescopic systems ……. 11
ANSI Z80.9 2010 – Annex A Mechanical design …….. 12

File Type Download : PDF File, ANSI Z80.9 2010



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