HDA-5x 38mm High Diopter Lens Magnifier. These unique Magnifiers are sometimes helpful to those with Amblyopia or Lazy Eye. They are also a nice low vision aid for those that require a higher magnification and find the small 38mm lens helpful, however it requires you to get your eye very close and to be centered on the lens. This is a specialized vision aid magnifier and not considered a general use magnifier, but is an effective inspection magnifier for small parts, stamps, coins etc. Has a metal frame and a comes with a leatherette protective storage case.