BS 2738-2:1989
Superseded
View Superseded by
Spectacle lenses Specification for tolerances on optical properties of uncut finished lenses
Hardcopy , PDF
English
02-28-1989
08-15-1996
Foreword
Committees responsible
Specification
1. Scope
2. Definitions
3. Lens power
4. Addition power of all lenses
5. Cylinder axes
6. Optical centration
7. Prismatic power
8. Geometrical tolerances
9. Marking
Appendix
A. Recommendations regarding subjective
characteristics of spectacle lenses
Tables
1. Lens power
2. Cylinder axes
3. Base setting of prisms
4. Prismatic power
Figures
1. Positions for determining, by use of a focimeter,
the addition power of a front surface multifocal
or progressive power lens
2. Recommended system for visually inspecting a lens
for defects
Permitted tolerances on prescribed lens power, cylinder axes, optical centration and prismatic power of lenses. Marking requirements are specified and recommendations are given regarding subjective characteristics.
| Committee |
CH/172
|
| DocumentType |
Standard
|
| Pages |
12
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| BS 2738-1:1989 | Spectacle lenses Specification for tolerances on optical properties of mounted spectacle lenses |
| BS 2738-3:1991 | Spectacle lenses Specification for the presentation of prescriptions and prescription orders for ophthalmic lenses |
| BS 2738-1:1989 | Spectacle lenses Specification for tolerances on optical properties of mounted spectacle lenses |
| BS 3521-1&2(1962) : AMD 892 | GLOSSARY OF TERMS RELATING TO OPHTHALMIC LENSES AND SPECTACLE FRAMES - GLOSSARY RELATING TO OPHTHALMIC LENSES. GLOSSARY RELATING TO SPECTACLE FRAMES |
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