Customer:
hello, i just want to make sure what is my correct pd number, how can i do that?

KZFOO:
did you have a pd on your prescription or are you measuring it yourself?

Customer:
in my prescription doesn't say anything about the pd

KZFOO:
it is something you can measure yourself if you have a metric ruler and a mirror and i can give you a photo with instruction on how to do that

Customer:
can i measure that wit my glasses on?

KZFOO:
you can but you may need to lower them a bit as you need to line up the lines of the ruler with your pupils

Customer:
ok, thanks you so much i will try it !!