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BS EN ISO 15253:2021 Ophthalmic optics and instruments. Optical and electro-optical devices for enhancing low vision >
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BS EN ISO 15253:2021 Ophthalmic optics and instruments. Optical and electro-optical devices for enhancing low vision, 2021
- undefined
- European foreword
- Endorsement notice
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 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
- 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)
- 5.2.3 Magnification
- 5.2.4 Exit image distance (applies to stand magnifiers)
- 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
- 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
- 6.2 Optical devices
- 6.2.1 Spatial resolution test
- 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
- 7.2 Instructions for use
- Annex A (informative) Determination of lateral variation of magnification
- Bibliography [Go to Page]