Materials glossary / Lens coating
UV400 (100% UV protection)
On the label: UV400 · Lens coating
What it is
A lens that blocks ultraviolet light up to 400 nanometres, which covers all UVA and UVB. In the US the claim is tested to the ANSI Z80.3 standard; it depends on the lens material and coating, not the tint.
Lens coatings: Layers applied to a lens: anti-reflective, mirror, polarizing film, photochromic dye, scratch-resistant hard coat.
In the research
2 PubMed papers mention it with jewelry, allergy, eyewear or UV; the three most recent:
- Intensifying ozonation treatment of municipal secondary effluent using a combination of microbubbles and ultraviolet irradiation · Environmental science and pollution research international, 2019
- UV-blocking spectacle lens protects against UV-induced decline of visual performance · Molecular vision, 2015
A paper is a paper, not a verdict: titles are listed so you can read them, and a study on one fabric or one filter says little about the piece in your hand.
Pieces whose listing names it
10 on the siteMatched from the words in the supplier's listing; the full material line is on each product page.
Made in the USA
Made in the USA
Made in the USA
Made in the USA
Made in the USA
Made in the USA
Made in the USA
Other lens coatings
Clasp & Lens describes materials from the public record and does not appraise, grade or test pieces; what a listing states is the supplier's statement. If a piece causes a rash, take it off; a reaction that spreads or blisters is a doctor's question, and sunglasses are no substitute for impact-rated eye protection where that is required.