BS 3521:Parts 1 & 2:1962
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Glossary relating to ophthalmic lenses. Glossary relating to spectacle frames.Glossary of terms relating to ophthalmic lenses and spectacle frames
Hardcopy , PDF
30-09-1991
English
01-03-1972
Method of writing prescriptions, specification of trial and prescription contact lenses, recommended in appendices.
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