Light within the 460–480 nm range is the primary band regulating our circadian rhythm: it boosts alertness during the daytime, yet strongly suppresses melatonin after dark. Wavelengths from 480–570 nm also produce secondary circadian effects, with human sensitivity gradually decreasing as wavelength increases. A subset of people with photophobia experience discomfort specifically to the 480–520 nm band — FL41 lenses are formulated for this group.
No single lens performs optimally for both day and night. This 2-Pack day & night combo is a versatile set of blue light blocking glasses, ideal as computer glasses, gaming glasses and blue blocker glasses for daily screen work. These non prescription blue light glasses work as blue screen glasses to reduce eye strain and discomfort. Our daytime FL41 pair filters excess harsh glare and unwanted screen blue light, while preserving the beneficial circadian signals your body needs; this reliable anti-migraine option is built for light-sensitive users. Our night red pair blocks these disruptive bands to support your natural sleep cycle, delivering stronger full-spectrum cutoff for highly sensitive users.
