You can search by keyword.

What is PD?
Your PD stands for Pupillary Distance, which is the distance between your pupils in millimeters. Your PD is very important for accurately fitting your lenses to achieve visual acuity. Generally speaking, the PD number of adults stays the same. The average PD for adults is 55-75 mm and for kids is...
How to read PD?
Your PD may be written in three ways: PD (OU), written as "64", means the Binocular PD which is for both eyes. PD (OD), means the Monocular PD for the right eye, PD (OS), means the Monocular PD for the left eye. A Monocular OD is written as two numbers, for example, "32/30",...
How to measure PD?
How to Measure PD? PD is very important for accurately fitting your lenses to achieve visual acuity. Generally speaking, the PD number of adults stays the same. The average PD for adults is 55-75 mm and for kids is about 42-55 mm. A difference about 2-3 mm is allowable. Checking with your doctor is recommended....