By Gisela K. Miller, Content resource from http://www.fashioneyewear.co.uk/designer-sunglasses/ray-ban-aviators.html
Gradient lenses are perfect options for your Ray Ban sunnies if you are very much concerned about dark spectacles that might hinder your sight while driving or enjoying a day at the beach.
The crystal gradient lens is tinted on the backside through a high vacuum process so that it can create smooth colour transitions.
The plastic gradient lens, on the other hand, creates a shading transition from dark to light through an accurate chemical immersion process.
The gradient lens type enables its wearer to experience overhead sunlight protection while having a visual access through the bottom half of the lens.
Such lens type is not just recommended for drivers but also for those who want to look cool while reading.
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