from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Occurring between the pupils of the eyes: interpupillary distance.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Between the pupils of the eyes
Sorry, no etymologies found.
Some prescriptions are not suited to certain frames, and the interpupillary distance (how far apart your eyes are!) will influence how thin the lens can be at the edge.
Then you need to have your interpupillary distance measured.
Their swivel open action is firm, but not stiff, and holds the interpupillary distance exactly where you need it.
Trinocular eyepiece Seidentopf, adjusts interpupillary distance 50-75 mm
Range of movement 30 x 70 mm; interpupillary adjustment range: 55 - 75 mm; graduated, oversized knobs on coaxial coarse and fine (0. 002mm) adjustments; packed in a specially molded Styrofoam shipping container; and owner manual, spare bulb, and other additional items.