Pupillary distance (PD) measures the space between the pupils of your eyes. If you are getting single vision reading glasses, use your near-vision PD, which. Distance PD is the distance between the pupils when viewing a distant target. Near PD is the distance between the pupils when viewing a near target. If you require prescription bifocal glasses then you will also need your Near PD, which is calculated by subtracting 3mm from this Distance PD measurement.
Hi, Ok in the olden days if a distance PD was 67, you would take 3 off, or substract 3 to get a near PD of Is that still the rule? Remember. If the numbers are higher (and different), like 62/59, then the first number is your Distance PD and the second is your Near PD (for reading-only glasses). Next, you need to calculate your near PD. To calculate the near PD, subtract “ three” from it. For example: Your distance PD is 70 so when you.
You'll need to know your PD if you want to order glasses from EyeBuyDirect. Don' t worry if your glasses prescription doesn't include your PD, we can show you. Your PD is usually measured for distance vision, which is 'Far PD", or "62" in this example. For reading glasses, doctors measure your "Near PD" or "59" in the. What is Pupillary Distance (PD). How is it measured and how it is essential to an accurate prescription. In most cases, PD value ranges from 57 to 65 mm, with the most common PD which may be entered while placing order and the other value 61 is near PD.