When Purchasing Glasses Online, Keep Frame Size Numbers in Mind!

When purchasing either reading glasses or prescription glasses online. It simply takes a few moments to enter the crucial eye test information, following which you can concentrate on choosing a stunning frame style from a limitless array of stylish brands.

 

However, keep in mind that your prescription only applies to the lens details for each eye.  Check the numbers on the inside of your current eyeglass frames, as these will be particular to your frame dimensions. The bridge, or the breadth of the frame over the nose, is denoted by the second set of numerals. The third pair of numbers represents the length of the temple or the length of the arm.

 

Because you will rarely need to adjust your present frame size, all that is required is to input the numbers exactly as they appear on your current glasses. After entering the prescription parameters and frame size values, the final piece of information necessary is the P.D or pupillary distance.

 

Pupillary Distance is a millimetre measurement between the centres of one pupil and the centres of the other - or, in other words, defining exactly where the lens goes in the frame so that your point of focus is targeted through the right region of the lens, known as the optical centre. The average PD for adults is 54-68 mm, however, exceptional accuracy is critical, especially for people who need a higher power lens.

 

While frame size numbers and pupillary distance may remain constant, it is always important to have regular eye exams, at least once a year and more regularly for those over 40, because prescriptions will change over time.

 

Therefore, nowadays it is very easy to buy prescription eyeglasses.