BS 7522-2:1993

Superseded

View Superseded by

Low vision aids Specification for spectacle magnifiers and similar devices

Available format(s)

Hardcopy

Superseded date

15-11-2000

Language(s)

English

Published date

15-03-1993

Publisher

British Standards Institution

Committees responsible
Foreword
Specification
1. Scope
2. References
3. Definitions
4. Classification
5. Frames, mounts, head-bands and screw threads
6. Performance characteristics
7. Optical characteristics
8. Physical characteristics
9. Marking, packaging and information to be provided
     by the manufacturer
Annexes
A. (informative) Recommendations regarding subjective
     characteristics of spectacle magnifiers
B. (normative) Corrosion test using simulated
     perspiration solution
C. (normative) Determination of equivalent power
D. (normative) Determination of distortion
E. (normative) Determination of diffusion
F. (normative) Determination of transmittance
G. (normative) Impact resistance test
H. (normative) Determination of ignitability (heated
     rod test)
Tables
1. Permissible levels of distortion
Figures
A.1 Recommended system for visually inspecting for
     defects
D.1 Distortion assessment charts
D.2 Arrangement for the determination of distortion
E.1 Diffusion angles
E.2 Arrangement of apparatus for measurement of
     diffusion
List of references

Specifies requirements, both optical and mechanical, for 4 types of appliances.

Committee	CH/172
DevelopmentNote	Supersedes BS 5043(1973) and 91/58104 DC (05/2002)
DocumentType	Standard
Pages	0
PublisherName	British Standards Institution
Status	Superseded
SupersededBy	BS EN ISO 15253:2000
Supersedes	91/58104 DC : JAN 92 BS 5043:1973

BS 3062:1985	Specification for ophthalmic lens materials
BS 3172:1987	Specification for screw threads for spectacle frames
BS 7522-1:1992	Low vision aids Specification for hand and stand magnifiers, including magnifiers with an integral source of illumination
BS 3521-1:1991	Terms relating to ophthalmic lenses and spectacle frames Glossary of terms relating to ophthalmic lenses
BS 3162:1959	Specification for ophthalmic trial case lenses
BS 6625-1:1985	Spectacle frames. Specification for general requirements