Eyebobs "Number Cruncher" hand-crafted rectangle reader glasses in acetate; Lens/bridge/temple (in mm): 54 - 17 - 140; Available in reader strengths: +1.00, +1.25, +1.50, +1.75, +2.00, +2.25, +2.50, +2.75, +3.00, +3.50; Flexible spring hinges; Thin, tapered arms; Can be fitted for prescription lenses; Imported