Through-the-lens binocular viewer

摘要: A magnification viewer system includes a pair of viewers adapted to be inserted into apertures in spectacle lenses provide relatively wider field view and lighter system. Each two-element objective lens single-element eyepiece lens. The doublet serves reduce vignetting while providing wide reduced chromatic aberration. Image quality may further enhanced keeping the weight down through use light-weight high index glass for Moreover, invention permits interchangeable series working distances, as well segments enable corrected user's ophthalmic prescription. In order criticality interpupillary distance, are formed with 16 millimeter (mm) diameter.