BS 4274-1:1968

$86.31

Visual acuity test types – Specification for test charts for clinically determining distance visual acuity

Published By	Publication Date	Number of Pages
BSI	1968	12

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Categories: 11.040.70 - Ophthalmic equipment, BSI

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Description

Basic requirements for test charts designed for either internal or external illumination, employing English (Roman) capital letters to determine the distance visual acuity. Provision is also made for the single letter C (Landolt or broken ring) and the single letter E (illiterate E) in various orientations.

Additional information

Status	Withdrawn
Pages	12
Publication Date	1968-01-26
Withdrawn Date	2003-01-13
Replaced By	BS 4274-1:2003
ISBN	0 580 00039 7
Standard Number	BS 4274-1:1968
Title	Visual acuity test types – Specification for test charts for clinically determining distance visual acuity
Descriptors	Letters (symbols), Ophthalmic equipment, Dimensional tolerances, Size, Luminance, Spaced, Lighting levels, Lighting systems, Ophthalmic test equipment, Illuminance, Contrast (optical), Test charts (ophthalmic)
Publisher	BSI
Committee	CH/172
ICS Codes	11.040.70 - Ophthalmic equipment

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BS 4274-1:1968

$86.31


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