GB/T 38004-2019 in English

This standard provides guidelines for the measurement systems and terminology used in the context of eyewear frames. It outlines the essential parameters and definitions necessary for consistent and accurate measurement practices within the industry. The document covers various aspects related to the dimensions and specifications of eyewear frames, ensuring a common understanding among manufacturers, suppliers, and users. It also includes procedures for measuring different components of the frames, such as the bridge width, temple length, and frame height. The standard aims to facilitate communication and standardization in the production and quality control processes of eyewear frames. Additionally, it specifies the terminology used to describe the different parts and features of the frames, promoting clarity and precision in technical documentation and specifications.