TrueDark Twilight Fitover Anti-Blue GlassesTrueDark Twilight Fitover Anti Blue Glasses Lightweight full coverage nighttime junk light blockers that fit over prescription glasses. When the sun goes down, blue light isnt the only junk light that can disrupt our sleep cycle and more than blue blockers are needed. Patented TrueDark Twilight is the first and only solution that is designed to work with melanopsin, a protein in your eyes responsible for absorbing light and sending sleep wake signals