Glass material and the resin material are mainly two kinds of Sunglasses lens materials. There are several factors do affect on choosing the lenses. Resolution, weight, durability and price.
* Glass Pros: excellent optical clarity, scratch-resistant ability, high hardness. Disadvantages: relatively heavy, the price is more expensive, poor impact resistance, and easy crushed or cracked.
* NXT polyurethane advantages: excellent impact resistance, difficult to damage, high optical clarity, light and flexible. Cons: Expensive.
* Polycarbonate advantages: good impact resistance, not easy to damage, optical transparency, light weight, small size, is the mainstream market. Disadvantages: relatively poor scratch resistance than glass or NXT polyurethane clarity slightly lower.
* Acrylic Advantages: cheap, low-cost alternative to polycarbonate, suitable for casual or occasional use fake Oakleys sunglasses. Disadvantages: optical transparency, slightly lower than that of polycarbonate or glass.
Lenses are classified as follows:
Polarized lenses
order to filter the sun shone on the water, land or snow on the direction of equality dazzling light, the lenses to add a special coating, so that a particular direction of polarization of the light to pass through the lens, thus preventing Multi-angle incident light glare. This type of lens is called polarized lenses. Most suitable for outdoor skiing, fishing and driving.
Photochromic lenses
Because the lenses to add silver halide chemicals that give a colorless lenses, glare met, it will become colored lenses to protect against the sun, and so is suitable for both indoor and outdoor use.
Colorful lenses
also called “dyed lens”, that is, the lens production process, with some chemical substances, so that the lens showing the color to absorb specific wavelengths of light. This is the most commonly used lens Oakley sunglasses cheap store type.
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