描述
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I. Standardized size parameters
1. Lens width (55mm): determines the field of view and facial coverage. Narrow frames (51mm2) are delicate, while wide frames (57mm8) enhance the aura and modify the face shape.
2. Nose bridge distance (22mm): optimized for Asian noses, the 18mm-22mm range improves anti-slip properties (such as SPR15W-F uses 19mm1), and relieves the wearing pressure of collapsed noses.
3. Temple length (145mm): The extra-long design (145mm2) is suitable for users with larger head circumferences, and the standard length of 135mm-140mm611 ensures stability.
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