FAQ: What is pd in glasses?

What is a normal PD for glasses?

The average PD measurements for women is 62mm and for men 64mm. Between 58 and 68 is quite normal though. We do encourage you to ask your optician for your PD measurement.

Can I find my PD on my glasses?

You usually can‘t find your PD number written on your eyeglasses. The numbers on the inside of the temple arms of some frames show the measurements for the frame itself. Your PD number should be written on your eyeglass prescription in the PD section.

What happens if PD is wrong on glasses?

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. If you have a high prescription and the wrong PD these symptoms are often much worse.

How do you find the PD on a prescription?

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. Jot it down.

Do opticians have to give you your PD?

You also need your prescription. Lots of optometrists will give you a copy of your prescription but not include your PD. That’s because they know that, armed with both, you can order your glasses online. And that hurts their bottom line.

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What if PD is off by 1mm?

A pd difference of 1mm is not going to cause trouble, in real terms 1mm is a variance of. 5mm to each eye, and would not be noticable. Even a 2mm difference in pupillary distance can cause a pair of eyeglasses to feel off because your pupils tend to converge or diverge to the center of the lens.

Can you measure PD from old glasses?

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.

Do I use distance or near PD when ordering glasses?

Distance PD can be used to order any type of prescription glasses except reading glasses. Read below to learn how to calculate near PD for reading glasses. DUAL PD, or monocular PD, consists of two numbers and is the distance between the centers of each pupil to the bridge of the nose.

Should I round my PD up or down?

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. But, seriously, those PD numbers that they gave you don’t make a lot of sense.

What if my PD is off by 5mm?

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.

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Why do I have two PD numbers?

The first number, which is always higher, is for distance, and the second number, which is always lower, is for near-vision reading only. Another example is if your numbers are 34.5/33.5, then it means your PD was taken one eye at a time.

Is PD important for single vision glasses?

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.

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.

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