Blue light (HEV) sits near visible wavelengths. Some pigments and iron oxides attenuate parts of that band; classic UV filters were not designed for it.
Consumer fear of laptop screens often outruns the irradiance math. Outdoor daylight remains the dominant HEV exposure for most people—yet ads lean hard on device anxiety.
Defensible positioning usually pairs visible-light-minded pigments with clear UV SPF/PA claims, without implying medical photoprotection against screens alone.
When reviewing: require spectral data or published methods if the claim names “blue light.” Vague “digital defense” copy is a soft rejection waiting to happen.