The VM-14 VisorMag from Carson Optical is a great accessory for anyone who does detailed work. It clips to the brim of most hats and caps. For example, if working with stamps or coins, this viewer will help you identify small details. If you're a fly-fisherman who likes to make his own lures, this item will make your work much easier. The clear acrylic lens produces a sharp, distortion-free image. The magnification power is 2.25x which is equivalent to a +5.00 diopter.
Simple and efficient device for magnifying small details