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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

Sunglass Lenses

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


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

Contact Lenses

Types of Contact Lenses
Contact Lens Information

Prescription Information

Understanding Your Prescription
Other Helpful Prescription Links

Guides & Videos

Guides & Videos
Helpful Articles
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