Measure your pupillary
distance (PD)

The average pupillary distance measurement is between 54-74 mm. For kids the pupil distance measurement is between 43-58 mm.

The pupil distance measurement does not have to be 100% accurate. If you are not comfortable measuring your own pupillary distance you can always ask your optometrist, or walk-in to our store. Our staff will be more than happy to help you with your pupil distance measurement.

The PD measurement can change for children as they grow. But once you reach adulthood, the pupillary distance usually stays the same.

While there are few tools to measure your PD online, it is much more accurate to do it at home yourself. And it is super easy as well! Here are the steps how to measure your pupillary distance online:

• Stand 12 inches or 30 cm away from a mirror
• Look straight into the mirror and hold a millimetre ruler/scale flat against your eyebrows. You can also use an app on the phone if you don’t have a ruler.
• Close your right eye and alight the 0 mm mark to the centre of your left pupil
• Now close your left eye while keeping the right one open without moving the ruler
• Find the mark corresponding to the centre of your left pupil. The measurement you get is your PD
• Repeat the process a few times to make sure the number you get is consistent

If you can’t figure out how to measure your PD online, you can just take a close snap of your eyes with a millimetre ruler placed horizontally over them and send the picture to us. We will give you an exact measurement or you can visit our store to get it done physically.

You can use your 8.5 x 5.4 cm bank card to measure your PD without a ruler. Remove your glasses and sit in bright natural light. Hold the card against your forehead using two fingers. Look straight directly into the camera and take a snap. Send the picture to us and we’ll give you your PD or add it automatically to your order if you’re buying prescription glasses from us.

If your PD isn’t correct, it might affect your vision and give you eye strains. This is why you must make sure your PD is correct before you place an order for eyeglasses.

PD should be as accurate and exact as possible. If the lenses are not centred properly, it can cause visual discomfort. However, it doesn’t have to be 100% precise as a small margin for error. But, to get the best vision, it should be as close to the accurate number as possible.

You can measure pupillary distance using your glasses. For this, you’ll need to keep your glasses on. Close your right eye and put a mark on the left lens of your glasses falling in front of your left pupil. Now do the same with your right eye while keeping the left eye closed. Take off your specs and measure the distance between the two marks and you’ll get your PD.