How do I measure my working distance and interpupillary distance?
While many things such as height, and personal preference should be considered, the easiest way to determine your working distance is to: Step 1 – measure the distance from between your eyes at the bridge of the nose, and the area you want to focus on (the mouth), while sitting or standing in the correct ergonomic position, (back straight and arms perpendicular to the floor). Step 2 – Subtract 1.5″ from the above measurement. That number is your working distance: Short (10″-13″) Regular (14″-18″ ) Long (17″-21″) X Long (22″-27″) Step 3 – The Interpupillary measurement (distance between your pupils) is the easiest of all to find, while looking through the loupes, focus on an object in front of you (such as your thumb). Slowly turn the middle knob on the top of the ocular until the two circles that you are viewing start to merge into one circle.
