BSI - BS 2738
Specification for spectacle lenses
inactive
| Organization: | BSI |
| Publication Date: | 12 June 1962 |
| Status: | inactive |
scope:
Definition of lens power. Tolerances on power of lenses, cylinder axes, optical centration of finished lenses, base-apex direction, plano-prisms. Finish, glazing, marking. Test methods not included.
Document History
January 31, 1985
Specification for tolerances on optical properties of mounted spectacle lenses
Specifies tolerance requirements for lens power, cylinder axes, base setting and power of prisms, and centration for spectacle lenses ready for wear. Includes tolerances for progressive power lenses....
BS 2738
June 12, 1962
Specification for spectacle lenses
Definition of lens power. Tolerances on power of lenses, cylinder axes, optical centration of finished lenses, base-apex direction, plano-prisms. Finish, glazing, marking. Test methods not included.