Ophthalmic optics. Semi-finished spectacle lens blanks - Specifications for progressive-power and degressive-power lens blanks Ingestion-build-53008 BS EN 3729 is a

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Ophthalmic optics. Semi-finished spectacle lens blanks - Specifications for progressive-power and degressive-power lens blanks Ingestion-build-53008 BS EN 3729 is a1 Scope This part of ISO 10322 specifies requirements for the optical and geometrical properties of semi finished lens blanks with finished progressive power and degressive power surfaces.