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How to ...

How to measure your pupilary distance (PD). Pupilary distance is the distance from the center of your right eye to the center of your left eye. This is important when ordering prescription lenses.

How To Measure PD

How to measure your PD so that your prescription sunglass lenses will be correct.

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How to ...-Aviator Sunglasses-John M. White-How To-How to measure-Size

How To Choose The Proper Aviator Sunglasses Size

How to make sure you get the right size when you purchase a new pair of sunglasses.

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