Customer Support: 131 242

  • There are no items in your cart
We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
Dismiss alert

BS 2738-4:1992

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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
Available format(s)

Hardcopy , PDF

Superseded date

15-08-1996

Language(s)

English

Published date

15-09-1992

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

Gives tolerances for optical and geometrical properties.

Committee
CH/172
DevelopmentNote
BS DRAFT 93/508650 DC REFERS TO NEW REVISION
DocumentType
Standard
Pages
12
PublisherName
British Standards Institution
Status
Superseded
SupersededBy

ISO 8980-1:2017 Ophthalmic optics — Uncut finished spectacle lenses — Part 1: Specifications for single-vision and multifocal lenses

View more information
$407.85
Including GST where applicable

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.

Need help?
Call us on 131 242, then click here to start a Screen Sharing session
so we can help right away! Learn more