Pd 29.5

Pd 29.5

Official distance 29.5?

29.5 is your monocular PD. 29.5 x 2 = 59 is your dangerous DP

57/2 = 28.5 A few years ago!

PD interpellar distance

Pd 29.5

Pd 29.5

This is half of your PD. To properly position the lens in the center, you measure the official distance and divide it by 2 (or half of your SD ... measured from the middle of each pupil).

This is the interpopular distance of one eye.

Pd 29.5