WS

 

Thanks to the success of the Back Surface series, Tokai further developed this technology to arrive at a new design: a combined aspheric front curve without addition with the aspheric atoric BS design which individualizes the lens.

thumb_176ws-design-engThis combination of 2 base curves in the front curve further improves the optical and aesthetical aspects of the lens, which means:
for minus powers, a deeper curve is used in far vision to reduce the effect of images becoming smaller in the peripheral area and a flatter curve is used in near vision for aesthetical reason.

This is inversed for positive powers: a flatter curve is used in far vision for aesthetical reasons and a deeper curve is used in near vision to reduce the peripheral magnification of images.

 

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