These hands-free, head-mounted glasses provide 2x magnification & can be adjusted so that each eye lens can be focused separately (±3 diopters), making the system adaptable to most users with low vision. The glasses will focus on near objects with working distances of 16 inches & are perfect for any near viewing activity where a magnified image is helpful. Dioptre adjustment for each eye individualy: -3.00 dpt to + 3.00 dpt Magnification 2x Free Working Distance 400mm Pupil Spacing 60mm...68mm Weight 49g