I have three sets(pair) of glasses from Zenni and am pleased with all of them. One set is non-prescription for computer distance, the other two regular bifocals. After the first set, I decided to try the next size up, since I seem to be in between. I use all three sets. One of the bifocals is smalll frame, the other large. At these prices, I can have multiple pairs for different uses. I highly recommend this product.