BSI - BS 4274-1
Visual acuity test types. Part 1: Specification for test charts for clinically determining distance visual acuity
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| Organization: | BSI |
| Publication Date: | 26 January 1968 |
| Status: | inactive |
| Page Count: | 16 |
| ICS Code (Ophthalmic equipment): | 11.040.70 |
scope:
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.
Document History
January 13, 2003
Visual acuity test types - Part 1: Test charts for clinical determination of distance visual acuity - Specification
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BS 4274-1
January 26, 1968
Visual acuity test types. Part 1: Specification for test charts for clinically determining distance visual acuity
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...
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