Ophthalmic optics. Uncut finished spectacle lenses - Minimum requirements for spectacle lens surfaces claimed to be abrasion-resistant Ingestion-build-156411 The purpose of this International

The purpose of this International Standard is to define dimensions of typical imperfections which might be expected in normal fabrication

d) measurement data processing in order to estimate a set of one-third octave band roughness spectra

BS EN 13545 describes commonly used dimensions for reusable general purpose pallet collars which ensure the suitable plywood quality for pallet collars

unique reference number or external cross reference

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Ophthalmic optics. Uncut finished spectacle lenses - Minimum requirements for spectacle lens surfaces claimed to be abrasion-resistant Ingestion-build-156411 The purpose of this International1 Scope This part of ISO 8980 specifies the requirement and test method for spectacle lens surfaces that are claimed to provide a basic level of abrasion resistance including those with coatings. A lens claimed to be abrasion resistant shall meet the requirements on both front and back surfaces. Lens powers and surface form is restricted for testing, however test results are applicable to claims for lenses and lens surfaces with identical properties