The interpupillary distance is the distance between the centers of your two pupils. The distance between the two eyepieces of the binocular microscope must correspond to your interpupillary distance. Each person has his or her own interpupillary distance and the microscope must be adjusted for your specific distance.

What is the function of interpupillary adjustment in microscope?

(E) Interpupillary adjustment

This allows the oculars to move closer or further away from one another to match the width of an individual's eyes. When looking through the microscope, one should see only a single field of view. When viewing a sample, always use both eyes.

What is Interpupillary scale?

Interpupillary distance (IPD) is the distance between the pupils of your eyes measured from center to center when your eyes are focused on infinity. ... Some binoculars have a scale on the center pivot to help with proper IPD adjustment.