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BS EN ISO 8596:2018+A1:2020

BS EN ISO 8596:2018+A1:2020

$102.76

Ophthalmic optics. Visual acuity testing. Standard and clinical optotypes and their presentation

Published By Publication Date Number of Pages
BSI 2020 20
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This document specifies a range of Landolt ring optotypes and describes a method for measuring distance visual acuity under photopic conditions for the purposes of certification or licensing.

This document is neither intended as a standard for clinical measurements nor for the certification of blindness or partial sight.

Other optotypes used for clinical investigations are described in Annex A for information.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
5 Foreword to amendment A1
Foreword to amendment A1
7 Foreword
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Requirements
4.1 Specifications of the standard optotype
11 4.2 Visual acuity grades and standard optotype grades
12 4.3 Test area and spacing between standard optotypes
4.4 Positions of the optotype
4.5 Quality of presentation
13 4.6 Luminance
14 5 Test methods
5.1 Viewing distance for distance visual acuity testing
5.2 Criteria for determination and assignment of visual acuity grade
6 Test report
15 Annex A (informative) Optotypes for clinical investigations
18 Bibliography

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BS EN ISO 8596:2018+A1:2020
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