The base lens of this item is "UV420 lens" with high quality Polarized function (Polarized degree over 99%). This lens cut UVA, UVB and HEV (High energy visible light / cut until 420nm), at the same time reduce glare by polarized function. It provide you comfortable sight you have never experienced, and at the same time protect your eyes from hermful rays.
What is UV420 lens?
You might think that the harmful sunlight rays are UVA and UVB.
But actually, the HEV(High energy visible light / 400nm - 420nm)is the most harmful sunlight for your eyes.
Due to which it can cause eye diseases.
Mostly, Normal sunglass lenses are only UV cut off until 380nm -400nm, But this lens can cut more harmful rays(HEV until 420nm) than that of normal sunglass lens.
This lens cut UVA, UVB, and HEV(High energy visible light/cut until 420nm), at the same time reduce glare by polarized function. UV cutting performance is superior.
Also, it is an excellent lens that protects your eyes from harmful rays.