GB 27995.2-2011
AbolishedSemi-finished spectacle lens blanks - Part 2: Specifications for progressive power lens blanks
半成品眼镜片毛坯 第2部分：渐变焦眼镜片毛坯规范
Application Summary AI generated
GB 27995.2-2011 specifies the technical requirements, dimensions, and optical performance criteria for semi-finished progressive power spectacle lens blanks. It is applied in the manufacturing and quality inspection of progressive lenses used in eyeglasses, ensuring consistent base curves and surface geometry for subsequent finishing by optical laboratories. This standard is relevant to ophthalmic optics, lens producers, and regulatory compliance in the Chinese healthcare and eyewear industry.
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