https://www.proz.com/kudoz/english-to-swedish/other/6505013-int-pd.html
This question was closed without grading. Reason: No acceptable answer
Apr 29, 2018 20:12
6 yrs ago
English term

Int. PD

English to Swedish Medical Other Optiktermer
This term appears in a software translation of an optics measurement machine. Measuring values needed for ordering glasses.

It is clear that this is some kind of "Pupil Distance".