Tokai’s advance 3D freeform back surface aspheric progressive design
Progressive zone, asphericity and power are simultaneously assimilated on the back surface of the lens – This offers a superior optical solution, while maintaining a perfectly smooth spherical surface
Tokai determine inset based on power
Tokai will determine the most appropriate front curve taking into account the balance between left and right
Four corridor options including 9mm, means most frame types are catered for