pupillary distance


pu·pil·lar·y dis·tance

the distance between the center of each pupil; the major reference points in measuring for fitting spectacle frames and lenses.

pu·pil·lar·y dis·tance

(pyū'pi-lār-ē dis'tăns) The distance between the center of each pupil; the major reference points in measuring for fitting of spectacle frames and lenses.