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.2017-03-21
Can pupillary distance be 1mm off?
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. ... A wrong PD can be calculated with the prentice rule.
What if my PD is off by 1.5 mm?
If you have been wearing glasses that are off by 1.5mm in PD and you keep the old PD measurement you likely feel better wearing the new prescription, since your brain has compensated for this slight difference.2006-04-25
Does PD on glasses have to be exact?
Your PD should be exact. If your lenses aren't centered correctly, they can cause discomfort and eye strain. A small margin of error might not cause problems, but it's better to be as accurate as possible.2020-05-13
Is it OK if pupillary distance is off?
Your Glasses 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.2017-12-26
What happens if your pupillary distance 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. ... This distance multiplied with the lens power equals the deviation a wrong PD produces.
How close does PD need to be?
Average pupillary distance for an adult is between 54-68mm, with acceptable measurement deviations generally falling in between 48mm and 73mm.