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What are the metal materials used for sp...

It is required to have certain hardness, softness, elasticity, wear resistance, ...

How to choose blue light blocking glasse...

Is there a function to block blue light? This must be noticed. Whether it is com...

How to clean progressive lenses

Because progressive lenses rely on precise measurements for their effect, some o...

How to clean progressive lenses

Because progressive lenses rely on precise measurements for their effect, some o...

Why choose brown glasses and sunglasses

You can't go wrong with a classic pair of brown sunglasses. Brown lenses are per...

How to remove scratches from glasses

Although we call them "glasses," modern lenses are sunglasses factory rarely mad...