Your PD is not included possibly because it isn't part of the prescription usually. Sometimes the optometrist will write it on there , but the law doesn't require it .If you want to measure your PD by yourself ,you can do it with a mirror .First, put a ruler on the bridge of the nose using one hand when you are looking the mirror. make sure to keep your head and eyes still during the process . Second,with your right eye closed ,keep the rule "0" measurement exactly in line with the center of your left eyes pupil . Then open your right eye,and read the number that lines up with the centre of the pupil of the right eye. The number shows your PD.In case of error , you'd better repeat it for several times and get an average value .