The CytoSleep Glasses V1 are the first in our CytoSleep series of glasses that block wavelengths of light which induce wakefulness. These glasses block a wider range of wavelengths than any other blue/green-blocking glasses for sleep enhancement on the market today, with a virtually flat transmission profile all the way up to 590nm, while providing high transmission in the 610-630nm range that most monitors emit, allowing for comfortable screen usage without disrupting sleep.