Know Your Vision
What UV420 Blue Light Protection Actually Does
Lensmaster Knowledge Centre • 25 September 2026
Digital screens, sunlight and artificial lighting all emit high-energy visible (HEV) blue light. UV420 lenses — like the OK PRO Blue Magic range — filter the high-energy violet-blue spectrum up to 420nm without distorting colours.
For heavy monitor hours, the Blue Magic coat combines this filtration with anti-glare and smudge-resistant layers, so the lens stays clear and comfortable through the workday.
If your day moves between screens, driving and outdoor light, a UV420 + photochromic combination (like Photo Grey adaptation) covers all three environments in one pair.
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