These are Zoff blue light cut glasses. The cut rate is approximately 50% and they are non-prescription. I am selling them because my job changed and I no longer use a computer as often. They have been used, so please understand that there may be some minor dirt, considering the price. I believe there are no problems with the performance. - Lens color: Blue light cut - Frame color: Black How about these for those who often look at computers, smartphones, etc.? I used them for about 2 months. A simple storage bag will be included. Please check the condition in the images. Thank you.