BS 2738-4:1992
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Spectacle lenses Specification for single-vision and multifocal semi-finished lens blanks
Hardcopy , PDF
08-15-1996
English
09-15-1992
Committees responsible
National foreword
Specification
1. Scope
2. Normative references
3. Definitions
4. Classification
5. General requirements
6. Test methods
7. Identification
8. Reference to this part of ISO 10322
Tables
1. Tolerances on surface power for spherical surfaces
2. Tolerances on surface cylinder power for cylindrical
surfaces
Figures
1. Recommended system for visually inspecting a lens
for defects
2. Measurement of the distance vertex power
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.