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Q&A for Smith Optics Rockford Slim Bifocal Prescription Sunglasses — 1 Questions & 1 Answers

Name Smith Optics Rockford Slim Bifocal Prescription Sunglasses
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Larry, guest, from CA, United States, asked on July 19, 2018

What are the difference between lens materials

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A
Answered by Heather, Gear Expert, from IL, United States, on July 20, 2018

You can select from CR-39 which is a basic plastic (cheapest lens material available. No UV or anti-scratch coatings, can also shatter however offers the best visual acuity out of all the plastics, and tints the best.

Polycarbonate is a more advance plastic lens (most commonly used). Its main feature are temperature resistance, impact resistance and optical properties. Polycarbonate lenses come with 100% UV protection and anti-scratch coating by default, and will not shatter. This lens material is perfect for all kind of sports, military and children.

Glass is the most scratch resistant with the best visual quality. Glass lenses are heavier than most other lenses.

Trivex is a plastic lens, which come with UV blocking properties and anti-scratch. This lens is very similar to polycarbonate but offer better visual acuity, like glass.

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