Pupillary Distance (PD)
Pupillary Distance alias PD is the distance from the centre of pupil of one eye to the other. PD is necessary for getting eyeglasses, to correct your vision. The measurement plays a vital part in determining correct positioning of your lenses within the frame. Especially when you are looking for bifocal or multifocal lenses, PD is mandatory.
Usually PD is mentioned on the glasses prescription provided by your eye care professional. Don't worry if it's not available, you can measure it yourself following few simple steps.
How to Measure PD Yourself?
You simply require a ruler and mirror.
- Stand in front of the mirror, around 8 inches away
- Keep your head straight and hold a millimetre ruler horizontally on the bridge of your nose
- The 0 mm point of the ruler should be in line with the centre of the left pupil (the black dot which you can see inside your eyeball)
- Measure across, from the centre of left pupil to the centre of right pupil. Make sure you hold the ruler steadily. The measurement which you get is your pupillary distance
- Repeat the above step 3, 4 times constantly, so that you get the accurate measurement
That's it, your PD is ready.
Things to Note:
- Usually the range of PD for adult is 54 - 74 mm
- Range of PD for kid is 43 - 54 mm
- Usually in case of bifocal or multifocal lens, two PD will be required. It is better to get PD recommended from your eye doctor / eye care professional
With your PD and prescription, you can order perfect pair of glasses at Framesbuy and enjoy enhanced vision.