Standard No.:	GB 27995.2-2011
English Name:	Semi-finished spectacle lens blanks - Part 2: Specifications for progressive power lens blanks
Chinese Name:	半成品眼镜片毛坯 第2部分：渐变焦眼镜片毛坯规范
Chinese Classification:	Y89    Other daily necessaries
Professional Classification:	GB    National Standard
ICS Classification:	11.040.70 11.040.70    Ophthalmic equipment 11.040.70
Issued by:	AQSIQ; SAC
Issued on:	2011-12-30
Implemented on:	2012-12-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	3000 words
Price(USD):	184.0
Delivery:	via email in 1 business day

1 Scope This part of GB 27995 specifies requirements for the optical and geometrical properties of semi-finished progressive power spectacle lens blanks. This part is applicable to semi-finished progressive power spectacle lens blanks. Note: The requirements for semi-finished single-vision and multifocal lens blanks are given in GB 27995.1. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the reference document (including any amendments) applies.

Foreword I 1 Scope 1 2 Normative References 1 3 Terms and Definitions 1 4 Classification 3 5 Requirements 3 6 Test Method 5 7 Marking 6 8 Identification 6 9 Reference to this Part 7