BL-2.5 Dental Loupes are worn like glasses, thus leaving the hands free for working and manipulation for detailed inspection. The BL-2.5 Galilean Telescope design has pre focus medical loupe style construction, high quality coated multi lens structure at a reasonable price. Includes interpupillary (IPD) and nose bridge adjustments. It has a comfortable 2.5x magnification with a working distance of 12-18 inches -Constructed with high quality multi glass optics and metal alloy lens frames. Comes in padded protective carrying case adjustable eyeglass retainer cord/lanyard to hold loupes while looking down and also comes with lens polishing cloth. Suitable for the vision impaired and a value priced option to professional binocular loupes. Focal length is approx 15-16 inches, working distance of 12-18 inches.