The Science
The 400–520nm Standard.
Most blue light glasses filter a fraction of the problem. We built the X0-1 around the full spectrum.
The Problem
Your circadian rhythm doesn't respond to blue light alone. The short-wavelength green light (450–520nm) suppresses melatonin just as effectively — and most glasses don't touch it. Filtering 400–450nm gives your brain 15% of the protection it needs. We filter 400–520nm. All of it.
Benefits
Melatonin Preserved
Block the 400–520nm range and your body produces melatonin on its natural timeline.
Cortisol Down
Evening light spikes cortisol. The X0-1 keeps that response calm.
Sleep Onset Faster
Wearers report 30–50% faster sleep onset on average.
Filtered Light Spectrum · 400–520nm
KRONVEIL X0-199% blocked
Typical blue-light glasses~15% blocked
400nm450nm520nm700nm
Kronveil Optics Lab · Independently lab-tested