What Size Should You Buy for Your Eyeglasses?
When speaking of buying suitable  eyeglasses, it will be very helpful to know what size of eyeglasses  frame will fit you. Those eyeglasses frames are used for holding the  lenses in place in front of the eyes. And only suitable eyeglasses frame  can provide customers a comfortable wearing. If you ask what sizes eyeglasses should you buy,  you shall first have a better understand what frame size includes and  how read them so as to measure your frame size in the right way.
Eyeglasses  frames always come in sizes and are accounted in millimeters. And the  size of a pair of eyeglasses is not a single number. In detail, the size  of a pair of eyeglasses frame includes lens width, and bridge distance,  temple length, lens height and total width as the following pictures  show you. 
 
And those numbers are usually  imprinted on one of the temples or the bridge of the eyeglasses frame.  However, there are often only three numbers such as 50-20-140. Most of  people may be confused those numbers. In fact, those numbers often stand  for lens size, bridge length and arm length respectively. In detail,  the first number 50 stands for lens width which describe the precisely  the distance between the vertical sides of the lens shape. Of course,  different shaped lenses may have different size for a pair of  eyeglasses. The second number 20 stands for the bridge size which is the  minimum horizontal distance between the nasal surfaces of the rims and  the third number140 stands for arm length which also called temple  length describing the length of an arm or temple. Choosing the right arm  length can fix your eyeglasses and prevent them from slipping down from  your nose.
So, if you want to know what frame  size you need for your eyeglasses, you shall prepare a ruler that is  capable of measuring millimeters and then measure your old eyeglasses  frame in the right way to get what frame size fit you. Then, you can use  the frame size to buy a new pair of suitable eyeglasses or order them  from online optical stores.
Article From:
http://www.newsunglasseslive.com/post/215.html
 
 
 
          
      
 
  
 
 
 
 
 
 
 
 
 
 
 
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