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BS 2738-2:1989 - Spectacle lenses - Specification for tolerances on optical properties of uncut finished lenses

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Type of Lenses Covered: Applies to uncut finished spectacle lenses, which are lenses that have been manufactured but not yet shaped for specific eyeglass frames. Optical Property Tolerances: Defines acceptable deviations in power, astigmatism, and prismatic effects to ensure accurate vision correction. Quality Assurance: Ensures that lenses provide consistent optical performance and comply with industry standards for vision correction. Application: Used by optical manufacturers, quality control labs, and eyewear professionals to verify that lenses meet specified tolerances before customization.
Contributor(s):
NAAR - Data Entry Person
Primary Item Type:
British Standard
Identifiers:
ICS 11.040.70 Ophthalmic equipment
ISBN 0580169413
Language:
English
Subject Keywords:
Focal length; Tolerances of position; Defects; Visual inspection (testing); Spectacle lenses; Dimensional tolerances; Tolerances (measurement); Spectacles (eyeglasses); Ophthalmology; Test equipment; Ophthalmic equipment; Lenses; Marking; Angular tolerances
First presented to the public:
3/12/2025
Original Publication Date:
2/28/1989
Previously Published By:
British Standards Institution
Place Of Publication:
London, United Kingdom
Citation:
Extents:
Number of Pages - 8
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2022-02-23 11:56:01.676
Submitter:
Nurul Aini Abdul Rahman

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