Multifocal Lenses - Gradal Individual

With Gradal Individual, Carl Zeiss has developed a progressive lens with revolutionary new properties: on the basis of Rx and fitting data provided by the optician, we compute and produce a progressive lens tailored precisely to each individual requirements.
Unlike traditional progressive lenses, the patient's specific centration data are also incorporated in the design of progressive lenses.
An innovative manufacturing technology has now made it possible to produce progressive lenses which are tailored to every patient's own individual requirements, further enhancing the visual comfort for spectacle wearers.
 

From evolution to revolution

With Gradal Individual, Carl Zeiss has developed a progressive lens with revolutionary properties: on the basis of the Rx and fitting data provided by the optician, we compute and produce a progressive lens tailored precisely to each individual requirements.
Unlike earlier generation progressives, the PD, back vertex distance, pantoscopic angle, boxed frame dimensions and near object distance are all incorporated in the design of the progressive lens for each individual case.
Thanks to pioneering, innovative production technology, what was considered impossible in the past has now become reality.

The result is astounding

The more exact the specifications provided by the optician for the lens in front of the wearer's eye, the more precisely we can focus our products on the requirements of each individual patient. The result: the usable ranges of vision – and hence wearer tolerance– are increased. The optician can always be sure that Gradal Individual will satisfy the needs of practically every presbyopic wearer – no matter how unusual their prescription.
The combination of the optician's fitting expertise and the ophthalmic know-how of Carl Zeiss is every patient's guarantee of a new dimension in visual comfort.

Tailor-made lenses for every Rx power

All wearer parameters provided in the lens order are incorporated in the lens design:

• PD
  Back vertex distance
  Pantoscopic angle
  Boxed frame dimensions
  Near object distance

What makes Gradal Individual so revolutionary?

In addition to the incorporation of various parameters in the progressive lens design for the very first time, we compute and produce Gradal Individual individually for every lens power.
In traditional PAL design, lens optimisation is performed for a power within a certain range, i.e. not for an individual dioptric power, but for a group of powers. Carl Zeiss has made this tailor-made process as accurate as possible by increasing the number of groups (base curves) used.
The design of Gradal Individual allows the lens to be customised for every power (dioptre, cylinder, axis, addition, prism, base). This is combined with the revolutionary possibility of incorporating various parameters in the lens design.

Maximizing individuality. Minimizing aberrations.

The outstanding feature of Gradal Individual is its very large usable fields of vision – even for data which deviate from the norm.
In the past, it was technically impossible to incorporate the pantoscopic angle, back vertex distance and PD in the computation and production of a progressive lens. Standard values had to be substituted for these parameters. This meant that the pantoscopic angle and BVD (back vertex distance) recommended by the lens manufacturer had to be observed to obtain optimum results in the fitting process.
However, this was not always possible often for anatomical reasons.

Until now, no allowance was made for the wearer's PD despite the fact that, along with the distance correction and the addition, it influences the convergence of the eyes required for near vision. In other words, the variable inset of the intermediate and near zones is partly determined by the PD of the wearer.