Firstly I will explain the meaning of Pupillary distance (PD). PD is the distance between the centers of the pupils. The PD is used to align the lenses to eliminate the excessive misalignment since there are different choices of frames, which will affect the focus of the lens. Higher prescription will have more effect on the unwanted horizontal prism.
The information used was cited from:
Aitken, S., (2007) Back to basics in dispensing: Pupillary distance measurement. The Optician, 233, 18-20.
This post was sponsored my ZenniOptical, the #1 online eyeglasses store, providing services at affordable price, taking into account of details, such as Pupillary Distance of the customers.
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Just a brief overview of the product of this store, this online eyeglasses store has large choices of frames, price ranging from $8 to $30. A basic prescription Eyeglasses would just cost $8.00, and it could be upgraded with premium anti-reflective coating for $4.95 and 7 sunglass colour tint for $4.95.
Message to all Professionals who just started taking into account of PD:
Always declare of what you are going to do and explain the process in detail instead of not telling the customers anything, causing them to shy away or reject it as they are not familiar/insecure with the process.
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