EUC DIFF blue light glasses, nonprescription

EUC DIFF blue light nonprescription glasses. Taupe (?) crystal frame in a classic slightly oversized shape, depending on your face. Slightly non-reflective and not so tinted that your eyes look yellowish. I have taken a few pics of me in different light settings. No scratches or flaws to note; comes with case as shown. I have a small face and square head and these fit perfectly. Questions welcome!