We recognise that every person and eye is unique. That is why we were the first to measure each eye and use thousands of data points to produce customised eyeglass lenses. It has made us what we are today. We are the vision expert. It is what motivates us to provide people all around the world with the best progressive glasses. We don’t settle for standard – we always go one step further.
BECAUSE EVERY EYE IS DIFFERENT
Since 1877, we have been pursuing a single goal: better vision. In doing so, we always make sure that we meet all requirements of spectacles wearers. To easily meet the demands and select the right lens, we divided our portfolio in three categories:
You are only satisfied with the very best and make extremely high demands on quality.
You want the most innovative and effective product on the market.
You who want a clear improvement in visual quality and visual comfort.
You are looking for a product of excellent performance at excellent value.
You attach value to better vision and reliable quality.
A branded product with superior performance and value is what you are looking for.
Since Rodenstock introduced Individual Lens Technology to the market in 2000 and the first individual Impression progressive lenses arrived on the market, individual lenses have gained importance worldwide.
Another milestone in ophthalmic optics was the introduction of the FreeSign® progressive lens in 2007. This unique design freedom made it possible for the first time to adapt the placement and size of the visual zones to the individual personal visual requirements and the visual habits of the person wearing the spectacles. Two years later, this freedom was passed on to the Ergo® near comfort lenses spectacles and developed even further.
Backgrounds
With progressive lenses, until now it has only been possible to change the spherical value for near vision in the form of the addition power. The cylinder value and the cylinder axis were adopted from the far refraction, since nothing else could be implemented from a technical perspective.
However, with Eye Lens Technology, Rodenstock has been able to master this technical challenge. It is now possible to realise a near refraction in a progressive lens that is independent of the far refraction.
There are a variety of causes of near astigmatism.
On the one hand, there are physiological reasons. There is a rotation of the eyes (rolling) during eye movements. Due to this rotation, there are different cylinder axes that have to be implemented in the lens depending on the line of vision. This is described in Listing’s Law.
Another cause – purely of a geometric/optical nature – is the so-called effective near astigmatism. This requires a different cylinder value for near vision than for far vision. And finally, there are individual anatomic causes that can lead to near astigmatism due to asymmetrical accommodation, for example due to tilting of the eye lens. These interrelationships and their effects are described in detail in technical literature.
Until now, however, it was assumed that there was no way to correct this near astigmatism in a progressive lens.
The fact that differences in the cylindrical correction between far vision and near vision could not be corrected belongs to the past now thanks to the EyeModel. Rodenstock, with its core competence in optimising and manufacturing individual lenses, is now able to calculate and manufacture such progressive lenses for the first time.
EyeModel: Listing’s Law and Effective Near Astigmatism
During optimisation of individual progressive lenses, the EyeModel takes into consideration the natural eye movements for far vision and near vision. Now, besides Listing’s Law for far vision1, which has already been taken into consideration since the year 2000, there is also an implementation of Listing’s Law for near vision. Hence, together with effective near astigmatism, the EyeModel opens up a new dimension for taking care of the visually impaired who have astigmatism, and that means better vision for more than 80% of the customers!
The improved performance of the progressive lenses is referred to as the EyeModel Effect, and can be seen based on the following comparison:
Because of taking Listing’s Law and effective near astigmatism into consideration, the spectacle wearer receives better correction in the near range. The EyeModel Effect provides an increase performance of the lens of up to 25% for the customer. In this way, the customer profits from perfect vision at all distances.
No additional measurements are necessary for improved near vision. This means the optician determines the refraction values for far vision and the addition power as usual. Rodenstock then calculates the respective new cylindrical effect (effective near astigmatism) including the cylinder axis (Listing’s Law for near vision) for near vision.
The effective near astigmatism can lead to a difference of up to 0.5 D between the far and near cylinder. In addition, the natural rolling of the eyes causes a cylinder axis change of up to 7° for near vision. Hence, an overall astigmatic error (EyeModel Effect) of more than 1.0 D can arise, which would reduce visual acuity in near vision by half. Since approx. 80% of all orders involve cylindrical lenses, the majority of all progressive lens wearers will profit from the EyeModel.
At Rodenstock, the lens surfaces are individually optimised directly after receiving the order using state-of- the-art mathematical processes and formula generated by high-performance computers. The lens design is not just pre-determined but solely based on the customer’s prescription.
Rodenstock eliminates the base curve effect through spherical optimisation. Thus every spherical prescription results in optimum optical performance for 100% satisfied customers.
With the Retina Focus Principle, a true to refraction imaging on the retina is ensured. By taking the real situation in wear (position of wear) into account, the spectacle wearer is precisely provided with the prescription he or she needs for vision at near with Rodenstock progressive lenses.
This technology offers the user a better vision in near and intermediate zones. It is specifically tailored to the eye’s natural movements for near vision. Lenses from the Excellence and Perfection family can be customised by specifying the pupillary distance.
The pupil size depends on the incoming light, the distance of the object and age. Pin-sharp vision is achieved at all distances, even in twilight or dark conditions when the pupil size is taken into consideration. The negative influence of spherical aberration on vision is minimised in every single point of the lens.
The individual parameters describe the fit of the spectacles on the patient’s face. For every individual, the progressive lens can be ideally calculated and will guarantee an ideal vision for the user.
Lenses with the ColorMatic IQ® 2 technology contain around one trillion self-tinting molecules. If UV light is incident on these molecules, they change their structure. This reaction causes the self-tinting process, which means the lenses darken.
For in-mass self-tinting lenses the dyes are integrated in the base lens. Compromises are therefore necessary in order to guarantee good optical properties with a high photochromic effect at the same time. This is where the unique ColorMatic® X-tra Fast technology comes into play.
Self-tinting lenses of the highest quality and perfect for all light conditions: Sunshine, glaring artificial light, shade or dim light. Protect the eyes from unnecessary strain – with ColorMatic® IQ 2 , available in attractive colours and adjusting to any light situation automatically.
Available in 1.60 and 1.67 index
ColorMatic® X-tra Fast uses the latest generation of Rodenstock dyes. They guarantee deep darkening in beautiful colours
– stable for many years. The special self-tinting high-performance coating is designed to provide maximum photochromic performance.
Available in 1.54 index
ColorMatic IQ® Sun 2 adjust themselves to every light intensity and perfectly protect the eyes, whether you sunbathe on the beach or enjoy a coffee in a shady pavement cafe in the afternoon.
Available in 1.60 index
The new high-tech material PRO410 protects against potentially harmful HEV (High-Energy Visible) blue light and provides 100% UV protection (UVA/UVB).
PRO410 filters the incident light – light components with a wavelength of over 410 nm pass through the lens. These light components are essential for vision and colour perception, as well as for smooth circadian rhythm (sleep-wake circle). Hence, the new material PRO410 ensures optimal protection and well-being.
The unique protective coatings are compacted to a high degree by plasma treatment. The coatings become a lot more flexible, and Rodenstock lenses with Solitaire® are twice as resistant.
Absorption from the front, the reduction of UV reflections on the back of the lens considerably reduces the strain on the eyes.
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