Once placed on your head, rotate the knob to adjust visor size from 6” to 8-1/2” allowing for a perfect, custom fit. Soft, padded band allows for a comfortable fit and extended wear. Visor can be flipped up and out of the way when not in use. Contemporary form-fitting design and lightweight precision lenses. Lenses are easy to snap in and out to change strengths. Fits over prescription or safety glasses. Excellent for precision detail work, crafts and hobbies.
Three interchangeable lenses have the following strengths: A six-inch focal length with 2.6 magnification; an eight-inch focal length with 2.2 magnification; and a 12-inch focal length with 1.8 magnification.