NEN EN ISO 15253 : 2000

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
   4.1 Magnifiers
   4.2 Telescopes - Distance vision
   4.3 Telescopes - Near-vision/telemicroscopes
   4.4 Telescopes - Adjustable
5 Requirements
   5.1 Optical characteristics
   5.2 Materials and construction
6 Environmental conditions of use
7 Test methods
   7.1 General
   7.2 Equivalent power - Magnifiers
   7.3 Angular magnification - Telescopes
   7.4 Resolution test
   7.5 Determination of lateral variation of
        magnification
8 Marking and instructions for use
   8.1 Marking
   8.2 Information to be provided by the manufacturer
Annex A (informative) Determination of lateral variation of
        magnification
Annex B (informative) List of equivalent terms

Applicable to optical devices specified by the manufacturer for use by visually impaired persons as optical low-vision aids. Defines mechanical and optical requirements and test methods for such devices, including optical devices with electrical components such as illuminators.