The new D-Free product allows you to offer your customers a technically 3D-optimized spectacle lens.

• Flatter base curve → more aesthetic glass
• Improvement of the channel width and the reading zone 
→ better immediate adaption 
• Reduction of glass thickness → weight reduction 
• Optimized for the OPTIC PROJECT-Designs 
• Backside compensation software can be downloaded via cloud-server

• D-Free stands for a new generation of individual progressive lenses with highest visual comfort.

• The combination of CX and CV freeform surfaces (PARABOLIC) is the logical step in a

maximal optimized generation of progressive lenses.

• By individualizing the PARABOLIC front surface (CX) AND the back surface .

(CV) it is possible for the first time to develop and produce an almost complete distortion-on-free progressive lens.

• Special D-Free calculation algorithms ensure perfectly matched CX and CV surfaces.

Differences to conventional backside processing

• The parabolic CX surface leads to a reduction of the base curve in the far distance. The result is not only a much more aesthetical pleasing appearance, but also less distortion the far distance zone as the front curve becomes flatter.

• Reducing the gradients on the CV side allows better manufacturing possibilities and a wider channel on the back.

• Reduction of total astigmatism

Powermap and cylindermap comparison & Cylinder surface

Visual field comparison