Magnifying Bifocal Safety Glasses 1.5 DiopterRead small marks with ease with Fastcap's Magnifying Bifocal Safety Glasses. When 64ths seem to merge together on your rule, but your vision is otherwise near normal, these bifocal magnifiers can improve accuracy dramatically. They provide uncorrected vision in the upper viewing field and correction for presbyopia (lacking ability to focus on nearby objects) in the reading section. Designed by a cabinetmaker with adjustable frames, anti fog coated