Focus Anti-Glare Optics by Envision Eyewear. Blue light reducing lenses helps reduce eye fatigue, and sharpens contrast while using computer.
Helps reduce Circadian sleep cycle issues related to excess blue light coming from CFL, Fluorescent, and LED bulbs that are everywhere in our
lives now. Blue light is also coming from LED TV's. tablets, smartphones, laptops and computer screens. This OTG Over-the-Glasses frame fits
people with up to 63mm Pupillary Distance (PD) for wearing over your prescription eyeglasses. Optical frame sizes can vary so please don't hesitate to ask questions.
This is about a Medium-large. Also works great without prescription eyewear to protect from overhead light.
UV light begins at 400 nanometers and above (smaller wavelength number = faster wavelength and more dangerous). Blue light is very intense and just inside our visible spectrum. This chart shows how LED, CFL & Fluorescent sources deliver a heavy dose of blue light.
This chart illustrates how blue light rich LED light sources are nearly identical to our Circadian Rhythm sensitivity. This means that excess blue light during the evening hours can make it difficult to fall asleep, and in some cases have a very negative affect on sleep cycles.