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BS EN ISO 15253:2021

BS EN ISO 15253:2021

$167.15

Ophthalmic optics and instruments. Optical and electro-optical devices for enhancing low vision

Published By Publication Date Number of Pages
BSI 2021 36
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This document is applicable to optical and electro-optical devices specified by the manufacturer for use by visually impaired persons as low vision aids. This document specifies requirements and test methods for optical and electro-optical devices specified by the manufacturer for use by visually impaired persons as low vision devices.

Implantable low vision devices are excluded.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 European foreword
Endorsement notice
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
17 4 Classification
4.1 Optical devices
4.1.1 Distance vision
4.1.2 Near and intermediate vision
4.1.3 Retinal illumination reduction or contrast enhancement
4.2 Electro-optical devices
5 Requirements
5.1 General
5.1.1 Risk assessment and management
5.1.2 Materials
5.1.3 Dimensions and weight
18 5.1.4 Flammability/Ignitability
5.1.5 Resistance to perspiration
5.1.6 Robustness
5.1.7 Resistance to drop
5.2 Optical devices
5.2.1 Spatial resolution
5.2.2 Equivalent power (applies to optical devices designed for near or intermediate use)
19 5.2.3 Magnification
5.2.4 Exit image distance (applies to stand magnifiers)
20 5.2.5 Entrance pupil diameter (applies to telescopes)
5.2.6 Transmittance
5.2.7 Image relocation
5.3 Electro-optical devices
5.3.1 Display size
5.3.2 Ambient temperatures
5.3.3 Image characteristics
21 5.3.4 Object (XY) table
5.3.5 Electro-optical device working distance
5.3.6 Text to speech system
5.3.7 Electrical requirements
6 Test methods
6.1 General
22 6.2 Optical devices
6.2.1 Spatial resolution test
26 6.2.2 Equivalent power – Magnifiers
6.2.3 Angular magnification – Telescopes
6.2.4 Transverse magnification – Stand magnifiers
6.2.5 Lateral variation of magnification test
6.2.6 Exit image distance – Stand magnifiers
6.3 Electro-optical devices
6.3.1 Display magnification test
6.3.2 Uniformity of magnification
7 Information to be provided by the manufacturer
7.1 Marking
28 7.2 Instructions for use
29 Annex A (informative) Determination of lateral variation of magnification
34 Bibliography

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BS EN ISO 15253:2021
$167.15