The Usage for UV400 Test Card
Test Your Sunglasses UV Rays In 10 Seconds | Real UV Proof With Our UV400 Test Card
Wear Cyxus UV protection sunglasses with certified UV400 lenses, full UVA UVB block for daily driving & outdoor eye protection
Ever wondered how to check if sunglasses block UV before purchase?
Many budget sunglasses advertise sun protection, yet it’s hard to verify their real UV-blocking effect.
As drivers, hikers and outdoor lovers, reliable outdoor eye protection matters a lot.
Every Cyxus polarized sunglasses UV shield includes a free UV detection card, plus an easy UV test card tutorial for home use.
How to test your lenses at home ?
- Grab the complimentary UV detection card inside your Cyxus sunglasses package.
- The card stays pale indoors; it turns deep purple under direct sunlight.
- Cover half the card with Cyxus lenses for 10s — the covered side remains light.
- Test regular sunglasses the same way, and you’ll see heavier purple discoloration.
This side-by-side comparison proves Cyxus provides stable, comprehensive UV protection sunglasses performance, with measurable UVA UVB block you can verify at home easily.