The distance between the wearer's eye and the object to be viewed is known as the Working Distance . It is generally accepted that the working distance for a tall individual will be greater than that of a short person. Depth of Field is the amount of focused vision in front of and beyond the viewed object. Generally, depth of field increases as the working distance increases. The total length across the focused field of view is known as the Width of Field .
Magnification affects the width and depth of field as well as the total weight of a pair of loupes.
As the magnification increases, the width and depth of field decrease and the weight increases. Studies indicate that the ideal declination angle is from 15 to 44 degrees. Therefore, it is important for the company representative to measure your DA as a means of determining the specific model best suited to your needs. The synopsis is available for download in PDF format by clicking here . Please note that all information in the synopsis was provided by the manufacturers.