Even sharper, even better contrasts, even more brilliant – it sounds like a commercial for a TV set of the latest generation. Yet we are talking about something very different. In fact, we are describing a revolutionary process that improves the quality of lenses. The new i.Profiler® system is the first of its kind that can analyse individual eye data that to date has not even been considered in the correction of vision problems. This data is subsequently used to manufacture optimum lenses - i.Scription® lenses.
Well over 700 years ago, man discovered a way to improve human vision with a visual aid. The spectacle, as we know it today, was developed around 1850. Since then a lot has happened. The latest milestone is a technology that allows a highly precise examination of the eye.
Why is this discovery so important? Because no eye is the same as another. Eyes are just as unique as finger prints. The i.Profiler® by Carl Zeiss Vision now makes it possible to measure eyes more accurately than ever before. The solution is based on the so-called wave front technology. In addition to the standard vision methods optometrists use, which usually involve testing the strength of vision only in day light and under high contrasts, this system also takes changes in light conditions, reflections, colours and changing contrasts into account. This means that the performance of the eye is also checked objectively under a variety of light conditions and contrasts. Consequently, aspects that are individual in every person can be analysed with maximum precision. This includes
All of these aspects are subsequently considered in the calculation of the lens values. For the patient this has a huge benefit: The performance of the eye can be analysed by the optometrist down to a one hundredth of a percent. This translates into a boost in accuracy compared to conventional methods times 25. Even vision problems that were ignored until now are now part of the customised lens calculation. The customer receives lenses that not only give him or her sharper and better contrast vision, but that also deliver much more brilliant colour spectrums.
Many people who wear glasses have no vision problems during the day. However, once night time falls, it becomes very hard for them to see. Excessive blinding and diffused light irritates their eyes severely. Driving a car becomes a bigger safety risk. This could be the result of lenses that have not been optimally adjusted. The measuring options available up until now were unable to detect all vision problems. Optometrists or ophthalmologists call this type of vision tests subjective refraction. It is the traditional letter recognition test. One of the tools used is a measuring device and the other essential ingredient is the cooperation of the customer. Those who have participated in this exam know how difficult it can be to detect the obvious differences.
Subjective refraction tests will still have to be performed – for instance to analyse the spatial vision. The new objective measuring system by Carl Zeiss Vision is used in addition to the conventional method. As a result, potential errors or limits the previous lens determination system was prone to can now be averted. Among those are tired eyes and the restriction to the evaluation of the day time vision performance.
The i.Profiler® analyses the eyes independent of each other and even if the pupils are dilated, like they would be at night. Moreover, it is the first system that registered so-called superior problems. While this term sounds bad, superior problems pertain to so-called dilation problems. Dilation problems cause light rays to be refracted more intensely on the outside edges of the lens than in the centre, which results in a reduced contrast perception. Another superior problem is the asymmetry problem, which occurs when light rays are refracted in such a manner that one sees something reminiscent of a fiery tail at the edges. Both phenomena are responsible for bad vision at dusk or at night.
The measuring results provide the basis for the i.Scription® lens optimisation, which Carl Zeiss Vision now offers as an add-on option for lenses. The system includes four components:
Customers who already have the new i.Scription® lenses are very enthusiastic about them. They enjoy greatly improved night vision and drivers feel safer in their cars. Colours are perceived more intensively, and all visual impressions are much sharper and the contrasts are much more impressive.