Carson VM-20 Magnifying Safety Glasses have a magnification of 1.5x with a diopter correction of 2.5. These scratch- and impact-resistant polycarbonate glasses serve as protection for your eyes and against harmful UV A, B, and C rays. Hobbyists and arts-and-crafts people choose to work with them because they aid in seeing small items they are working with. The flip-up lens system allows you to move the lenses up to see normally.