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Knowledge Center

FD Knowledge Center

Everything you ever wanted to know about frames, lenses, contacts, eyewear brands, vision, and eye health. Use the menu below to jump to specific sections.

Prescription Eyeglass Lenses

Lens Types
Lens Materials
Lens Coatings & Add-ons
How to Clean Your Glasses & Lenses

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Sunglass Lenses

Sunglass Lens Colors
Sunglass Lens Color Guide
Sunglass Lens Types
Specialty/Branded Sunglass Lenses
Sport-Specific Sunglasses & Lenses

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Frames

Frame Shapes
Frame Materials
Designer Eyewear Brands
Frame Style
Frame Selection Help
Special Features

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Contact Lenses

Types of Contact Lenses

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Prescription Information

Understanding Your Prescription
Vision & Eye Health
Other Helpful Prescription Links

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Guides & Videos

Guides & Videos
Helpful Articles

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Bestselling Eyeglasses

Ray-Ban RX5154 - Clubmaster Eyeglasses
Black Havana (5491)
$170$127.50
Ray-Ban RX5228 Eyeglasses
Black-Teal Temple (5544)
$170$127.50
Oakley Airdrop Eyeglasses
Black Ink - Size 51 (OX8046-0251)
$160
Shuron Ronsir Zyl Eyeglasses
Black Briar with Silver Chassis and Slipper Temple
$115$105.50

Shop All Eyeglasses

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