FreeForm by Prescriptor

Freeform Technology is upon us and it is the next generation in personalized lens processing. The CNC Generators first made it possible to consider using FreeForm Lens Designs on the back surface of lenses. The introduction of Lens Polishers capable of polishing these surfaces made the dream a possibility.

Prescriptor software by Shamir now makes it a reality. The Prescriptor software controls the whole surfacing process to insure the highest degree of accuracy in producing FreeForm surfaces.

We first have a lens designed using Shamir's Eye Point Technology. This design is then transferred to the Prescriptor. Each point on the lens is calculated to determine what thickness and curvature is needed to produce the lens design.

The RX including the fitting information is then added to the Prescriptor software. This information including the frame dimensions or preferably a tracing of the frame is incorporated into the Prescriptor.

The Prescriptor calculates this information to produce the thicknesses and curves needed at each point on the lens surface to produce the most optically correct and the thinnest lens possible.

The information from the Prescriptor is then transmitted to the blocker providing the information on the where and how to block the lens along with the size of block to use.

After blocking the lenses go to the CNC Generator. The Prescriptor software downloads the information into the generator. It tells the generator exactly how to cut the personalized lens and at what points the curves and thickness must be to maintain the integrity of the design and to produce the correct Rx and thickness wanted.

Polishing is next and the information from the Prescriptor is downloaded into the polisher. It controls what soft tool to use, the time, the spindle speeds and pressures necessary to correctly polish the lens and maintain the design integrity.

The Prescriptor isn’t finished. We have one last step. The information from the Prescriptor is downloaded into the laser engraver. The laser then puts the laser engravings on the surfaced lens.

The Prescriptor is finished.

We then deblock the personalized lens, check it and process it through the finish department.