As a hesitant buyer, I invested in these clear bifocal safety glasses for my work in the construction industry. After I put it to the test I was underwhelmed by their performance .The lenses were prone to scratches and SMUDGES, impairing my vision. While they were lightweight, they did not fit well and kept sliding down my nose. The only pro was the price point, but in the long run, they were not worth the investment. Overall, I would not recommend these industrial and scientific glasses for anySee full review