Photochromic lenses7 min read
Photochromic Grey vs Brown Lenses
Compare photochromic grey and brown lens programs by appearance, activated state, material, test conditions, sample approval, and wholesale order specification.
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Technical buying references
Optical Lens Buying Guides
Clear explanations for comparing lens materials, coatings, performance claims, samples, and purchasing specifications.
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These guides are written for distributors, optical laboratories, retail groups, and independent buyers preparing samples or quotations.
Buying process9 min read
How to Specify a Wholesale Optical Lens Order
Use a practical optical lens order checklist covering design, material, power range, diameter, coating, performance data, packaging, samples, and inspection.
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