How to ...
How To Select The Darkness (Density) Of Sunglass Lenses
As a pilot I am always considering what is the correct darkness (density) of sunglass lenses is correct for my flying conditions. General purpose sunglass lenses will have VLT (Visible Light Transm...
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To start with it is important to understand the terms used for defining a pair of sunglasses. These are as follows: Eye Size - this refers to the horizontal width of the lens in the sunglasses fra...
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