We found that: (1) Monocular PD asymmetry varies about 2mm (2 standard deviations). (2) The average person's eyes differ in monocular PD by 1mm. and (3) Men show slightly more difference than women. Of the total population, 88 percent have a monocular PD asymmetry of up to 2 mm.... read more ›
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.... view details ›
Average pupillary distance for an adult is between 54-68mm, with acceptable measurement deviations generally falling in between 48mm and 73mm.... see details ›
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.... see details ›
If your pupil distance does not match where the centers of your pupils are, your vision can be affected– Like wearing someone else's glasses! The wrong PD can induce eye strain, fatigue, headaches and blurry vision. If you have a high prescription and the wrong PD these symptoms are often much worse.... continue reading ›
Some offices will put the PD measured by some of the instrumentation during your exam on the prescription and others will have the optician take that measurement for you. The doctor during your exam does not take your PD at anytime during your exam, as that is left to the optician who is going to make your eyewear.... see details ›
As children grow up, their PD keeps on changing but once they become adults, this value remains constant. Your prescription can either have one PD value or two PD values, knowing your PD is very important so that you may buy prescription glasses that fit your face perfectly.... view details ›
We expect the pupils to sit slightly closer to the inside of the frame than the outside, but fairly central to the centre of the lense. If you have a small PD of 40 or so, you will need a frame with a smaller PD, and trying on glasses with a PD of 60 will make you look almost cross-eyed.... view details ›
What is the average pupillary distance (PD) for females? The average PD for adult females is 62 mm, which is about 2.44 inches.... see more ›
I would round up, myself, because those gadgets measure at what doctors refer to as "optical infinity" and that usually works out to around 20 feet. I found that rounding my own value up, makes the glasses MUCH more comfortable.... continue reading ›
Your PD has no effect on the size of your eyeglass frame. The PD number influences the shape of your lenses, but not the frame.... view details ›
A general rule of thumb is that most adults have a PD from 55 to 65 while most children have a PD from 42 to 54.... view details ›
Combination of Effects of Wearing Wrong Prescription Glasses
A sudden onset of vertigo, headaches, blurry vision, headaches, and eye fatigue can indicate many different health problems, some of them more serious than others.... continue reading ›
Grab your old glasses and a non-permanent marker pen. Get your partner to mark a small dot where your pupil is behind the lens. Measure the distance between the dots for your total PD.... see details ›
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.... continue reading ›
Once you're ready, face the mirror and hold the ruler up against the bridge of your nose. Look straight ahead and align the 0 millimeter mark with the center of your left pupil. Measure the distance from the center of your left pupil to the center of your right pupil. Now you have your pupil distance measurement.... read more ›
- Stand 8 in. away from a mirror.
- Hold a ruler against your brow.
- Close your right eye then align the ruler's 0 mm with the center of your left pupil.
- Look straight then close your left eye and open your right eye.
- The mm line that lines up to the center of your right pupil is your PD.