I am a fool for purchasing these. Yes, one may get what one pay’s for, but this product is an insult to cheap. The first pair broke within 8 hours. Made in China, perhaps, but China would be ashamed of such poor quality.The yellow lens help cancel out the blue computer light well! I never experienced eye discomfort from starring at computer screens for several hours but after getting a new job and looking at screen 10 hours or so daily, I bought these glasses as a preventative measures. I find that using these help me go to sleep better because I’m not constantly bombard with blue lights. They are a bit flimsy but for the price, I’d buy this product again. Very nice sunglasses. They don’t feel cheap at all. Nicely constructed and the color of the lenses is awesome.