Sophisticated slim readers that are incredibly compact! SlenderEyes are wafer-thin, not much bigger than a penknife. Yet the magnification is exactly what you need to read the small print of train schedules, menus, phone books and more. Optical grade lenses let you focus quickly and easily, and the attractive metal frames are lightweight, stylish and comfortable. The matching case fits easily in a pocket or purse for easy access, or clips to your pocket. Available in five strengths from +1.0 to +3.0. Here's the lens measurements on this popular reader: Front Width: 5", Lens Width: 1" Lens Height: 3/4"