Varifocals / Progressives
Progressive or Varifocal lenses provide a smooth progression from distance correction to near correction. This eliminates segment lines, and also gives a third area of the lens. This intermediate vision area allows for clear vision at arms distance.
Standard - Ideal for new and familiar progressive lens wearers, this traditional design offers a wide distance zone for natural eye movement, coupled with a smooth progression to near vision. This lens design has medium peripheral distortion yet it relatively easy to adapt to.
Premium (Freeform / Rear Surface) - This optimum design provides tremendous clarity from distance through to near with minimal soft focus and incredible fast adaptation. Freeform, or direct, surfacing makes it possible to grind the front, back, or both sides of a lens as needed to produce sophisticated tailored lens designs.
Elite (Freeform / Rear Surface) - This elite design offers optimised digital Ray-Path* technology with balanced power distribution between distance and near vision areas for enhanced vision across the whole lens including computer and office activities.
The technology on these lenses is a big leap forward even on the freeform progressives we currently offer, and therefore is the lens of choice for those considering a varifocal lens.
*Digital Ray-Path is a patented state-of-the-art technology based on an accurate simulation of the eye lens model. Lenses can have prism, pantoscopic tilt, wrapping angle, any frame shape, and can be located at any distance from the eye. Digital Ray-Path will manage back and front surfaces, not just spherical, torical or standard aspherical or atorical surfaces. For every lens design, each gaze direction is simulated at the distance it will be focusing in the real world.
Rays will come from any point of the object space into the retina of the eye. Skew rays are possible, and finite size pupils are considered. Finally, image quality is computed by means of an imaging model taking into account eye and lens characteristics.
In summary this unique calculation method studies all the variables which may have some effect on the overall vision quality. Due to this accurate calculation the final lens provides the optimum power that the wearer needs in every gaze direction. This type of designs represents the highest optical quality and advanced technology on the market.