HOYA’s Free-Form design approach is based on the understanding that no two eyes are the same. Our patented Integrated Double Surface Design (IDSD) technology maps the specific rotation of each eye, creating the blueprint for lens construction. HOYA Free-Form Fabrication then uses diamond point tools to shape the lens to the exact specifications of your eye rotation.

The prescription determines whether a lens is single-vision or progressive. The design technology determines the level of optical performance.

HOYA has created the world's first integrated Double Surface Progressive lens with complete customization of all lens surfaces. It is surfaced on both front and back sides of the lenses to provide complete customization for each prescription variable. It provides a wider viewing channel for progressive wearers so the side distortion is minimized and provides distortion-free vision, and the widest visual field.   The HOYA iD lens technology offers you natural and relaxed vision at all distances – near, far and in-between.