How do you measure PD for glasses with a regular ruler?

Look straight ahead into the mirror and position the ruler over the bridge of your nose. Starting with the right eye, line up the zero end of the ruler at your pupil; measure the distance from your right to your left pupil. The millimeter number that lines up with your left pupil is the measurement you want.

Is a PD ruler in mm?

PD is short for pupillary distance. This is the distance in millimeters between the pupils of the eyes. This measurement is required to correctly position your lenses.

How do you measure PD with mm ruler?

Method 1: The Mirror

  1. Get a millimeter ruler.
  2. Stand 8 inches from a mirror.
  3. Hold the ruler up to your face.
  4. Close your right eye.
  5. Align the ruler’s “0 mm” mark with your left pupil.
  6. Open your right eye and Close your left.
  7. Check what “mm” mark aligns with your right pupil. That number is your PD.

Can I measure my PD with my phone?

PD Meter App by GlassifyMe GlassifyMe’s PD Meter App is available for both iOS and Android. All you need is a standard card with a magnetic strip (gift card, rewards cart, or points card) and you can measure your PD using the app in a few quick steps – without the need of a ruler.

What’s the average PD for a woman?

about 62mm for
Facts About P.D. An average PD measurement is about 62mm for women and 64mm for men. For children the measurement usually ranges from 41 to 55 mm.

Is there an app to measure your PD?

EyeMeasure enables you to measure your Pupillary Distance (eye to eye) & now Segment Height instantly at near and far distances. No mirrors, credit cards, tape measures or objects needed. It’s accurate to up to 0.5mm for the perfect prescription glasses. Please note: iPhone X or newer is required for this app.

What if my PD is off by 1mm?

What if PD Is Off by 1mm? When the PD is wrong by a millimeter the outcome for the wearer will be very different depending on the lens power in the glasses. A wrong pupillary distance is measured in millimeters. This distance multiplied with the lens power equals the deviation a wrong PD produces.

How do I know my glasses Size?

To find it, take your measuring tape and measure horizontally across the front of your frames, including any hinges or design features that stick out on the sides. Once you know the measurements of your current glasses, you can easily convert those to sizes – small, medium and large.

What if my PD is not on my prescription?

If your PD is off, the “optical center” of your lenses will be, too, and your glasses won’t be as effective as they should be. You also need your prescription. Lots of optometrists will give you a copy of your prescription but not include your PD.

Can I measure my PD Online?

The best option of measuring your PD is by using our free online tool. We recommend this way as it’s fast, easy, and accurate. All you need for our online tool is a smartphone or a webcam and a card with a magnetic strip.