ONORM EN ISO 15253 : 2000
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
OPHTHALMIC OPTICS AND INSTRUMENTS - OPTICAL DEVICES FOR ENHANCING LOW VISION
15-01-2022
12-01-2013
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
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.