If it's a low power,your fine . If it's a high power , you would want to tell the optician when you get your next pair of glasses. How off is the PD ? If it's off by 5 MM on a high power, have the optician make you glasses 2 MM off, you should be fine .
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.
Two low numbers (e.g. 30/31): The first number is the monocular PD for the right eye (O.D.) and the second number is for the left eye (O.S.). Two high numbers (e.g. 62/59): This is used only for reading glasses. The first number is your Distance PD and the second number is your Near PD.
SINGLE PD is the pupillary distance between the center of one pupil to the other, which can be a distance PD or near PD. Distance PD can be used to order any type of prescription glasses except reading glasses.
The former, which is always higher, is for distance, and the latter, which is always lower, is for near-vision reading only. Another example: If your numbers are 33.5/32.5, your PD was taken monocularly, meaning one eye at a time. The first number is for your right eye (OD); the second is for your left eye (OS).
One thing that is often overlooked regarding pupillary distance is the frame measurements. Different frames can affect a pupillary distance because of the differentiation in the optical center. This is especially true with larger lenses and frames that may rest on a face differently.
Guarantee an accurate pupillary distance measurement with EyeQue's PDCheck app: Download the free PDCheck app on your Android or iOS smartphone, and put on your PDCheck Frames.
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.
Knowing the right PD measurement of your pupils will ensure the correct centration of your prescription lenses. The average measurement is between 60mm and 66mm and it is possible to select 'Average PD' when entering prescription information online.
Typically, the Pupillary Distance falls in a range between 54 and 65 mm. As children grow up, their PD keeps on changing but once they become adults, this value remains constant.
The Federal Trade Commission enforces the Eyeglass Rule. It requires eye doctors — ophthalmologists and optometrists — to give patients a copy of their prescription – whether they ask for it or not. Here are questions and answers to help you comply with the Eyeglass Rule.
Pupillary distance is extremely important when fitting any kind of glasses – including single vision glasses. Glasses lenses are designed that way for maximum effect. If the measurement is not correct, this optical centre will still be at the centre of the lens, but it won't align with your pupil.
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. That number is your PD.
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A single PD is the measurement, in millimeters, from the center of one pupil to the center of the other. A dual PD is the measurement of the center of each pupil to the center of the bridge of your nose.
Measure PD with a Ruler and a Mirror
- Stand 8 in away from a mirror.
- Hold a ruler against your browline.
- Close your right eye.
- Align the ruler's 0 mm with the center of your left pupil.
- Look straight ahead.
- 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.
Close your right eye and align the ruler's zero to the center of your left pupil. 3. Without moving the ruler, open your left eye and close your right eye. The distance measured to the center of your right pupil is your PD.
AXIS - this is the position of the CYL, usually specified by three digits, ranging from 001 to 180. PD - this is the pupillary distance, or the distance measured from the center of the bridge of the nose to the middle of the pupil, or may also be expressed as the distance between the two pupils.
