Eyewear buyer guides

8 guides on lenses, safety standards and sourcing for brands and distributors.

Polarized vs Non-Polarized SunglassesPolarized lenses cut reflected glare from water, roads and snow; non-polarized lenses only reduce overall brightness. Both can block 100% of UV if the…How Do Photochromic Lenses Work?Photochromic lenses contain molecules that change shape when hit by ultraviolet light, which makes the lens darker; when the UV goes away they return …What Is ANSI Z87.1? Z87 vs Z87+ vs EN 166ANSI/ISEA Z87.1 is the US standard for occupational eye and face protection. A Z87 mark means the product meets the basic impact requirements; Z87+ me…How to Stop Safety Glasses Fogging UpGlasses fog when warm, moist air meets a colder lens. The fixes are a permanent anti-fog coating, airflow around the lens, and a fit that keeps breath…What Does UV400 Mean?UV400 means the lens blocks light with wavelengths up to 400 nanometres, which covers all UVB and UVA rays. It is the same claim as "100% UV protectio…How to Choose Cycling SunglassesGood cycling sunglasses cover a wide field of view, stay put on rough roads, don't fog on climbs, and use a lens tint suited to the light the rider ri…PC vs TAC vs Nylon Lenses (6C / 8C Base Curve)PC lenses are the impact-resistant default for sport and safety; TAC lenses are the low-cost way to make polarized fashion sunglasses; nylon lenses gi…How to Source Custom Sunglasses from ChinaSourcing custom sunglasses from China goes in six steps: pick models, send logo and quantities, approve a digital proof, approve a physical sample, ru…

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