BS 4274-1:1968

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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.

All current amendments available at time of purchase are included with the purchase of this document.

Product Details

Published:

01/26/1968

ISBN(s):

0580000397

Number of Pages:

12

File Size:

1 file

Product Code(s):

862695, 862695, 862695

Note:

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