Eyeglass Lens Material
Hard Resin (CR-39) or Regular Plastic Lenses: the most widely used material for eyeglass lenses. It's lighter in weight than glass, providing a more comfortable lenses. Scratch-resistant coating is highly recommended for plastic lenses. Recommended prescription range for CR-39 Plastic Lenses:
Sphere power below + or – 1.00
Cylinder power below + or – 1.00
Polycarbonate: A revolutionary material that delivers a lightweight, impact and scratch-resistant, thin lens for superior comfort with UV protection. Thinner than regular plastic lenses and great for active people - especially kids. Recommended prescription range for Polycarbonate Lenses:
Sphere power below + or – 3.00
Cylinder power below + or – 2.00
High Index: For people with a higher prescription, High Index produces a thinner, lighter, more attractive lens with superior optics. Recommended prescription range for High Index Lenses:
Material Index 1.56 or 1.60
Sphere power below + or – 3.00
Cylinder power below + or – 2.00
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High Index 1.67
Sphere power below + or – 6.00
Cylinder power below + or – 4.00
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High Index 1.74
Sphere power + or – 8.00 or above
Cylinder power below + or – 6.00
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Trivex: Offers a triple combination of features never before found in a single material. Superior Optics, Impact Resistance and Ultra light Weight. Recommended prescription range for Trivex Lenses:
Sphere power below + or – 3.00
Cylinder power below + or – 2.00
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