Suitable for large-frames personal eyeglasses, these are economical, lightweight and of ophthalmic quality.
Working Distance Power Diopter
Model 712 20″ 1.50x +2
Model 713 14″ 1.75x +3
Model 714 10″ 2.00x +4
Model 715 8″ 2.25x +5
Model 717 6″ 2.75x +7