Before You Buy Your Glasses Cheaply Online, Learn How To Measure Your Pupillary Distance
Quantifying your pupillary distance:
This measurement is the distance between the centre of your pupils that is measured in millimetres.
Opticians do not tend to give out this measurement as it encourages patients to buy their spectacles from them whereas you can buy cheap spectacles online or designer glasses at a fraction of the price online. It is ordinarily noted as 1 measurement for example 60 (60mm) but can also be shown as R 29 L 31. When written like this it is the individual distance from you right and left pupils to the centre of your nose.
When Varifocals, High Prescriptions or Prisms are ordered the measurement is usually split individually. Generally it is written as a single value for most single vision prescriptions.
If you do not know this measurement and don’t want to measure it yourself then most online opticians will make your PD the national average (63) for men and (60) for women.
Ask a family member or friend to physically measure your PD:
This is the easiest method for measuring you PD. To do this, ask a friend to sit opposite you and place a ruler against your forehead so that they can read off the markings from the ruler.
Next ask your friend to close their right eye and you then look directly into their left eye. Request your colleague to slide the ruler to bring about the zero value is in the center of your right pupil and to keep the ruler very steady across your frontal bone. Subsequently, you will need your associate to shut their own left eye and you will need to look straight into their right eye.
Your associate will then take off the measurement to the centre of your left pupil. And that is it! It really is that easy! Please see the diagram below to help you further.
Using your present-day eyeglasses to evaluate you pupillary distance with assistance from a friend:
Do wear the glasses before hand and ensure that they fit nicely. Ask your assistant to stand opposite you and verify on your lenses the position of your pupils with a non permanent marker.
There should be two lines visible in your line of sight, whilst you are viewing through your spectacles. Take off your glasses and measure the distance between the two markings. And that is it! If the measurement reads 6cm the PD distance will be 60. If the measurement is 6.3cm then your pupillary distance will be 63.
If you have a varifocal measurement, then just measure across from your right eye to the centre of your nose and then again from the centre of your nose to your left eye and record the individual readings for both your left and right eyes. If you’re not in the market for buying sunglasses with prescription lenses in then don’t worry about what’s in this article.
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Tags: eye glasses, spectacles, vision
March 31st, 2009 at 7:22 pm
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