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Scanner sets new standards in made-to-measure lenses

September 2014

A unique device which allows opticians to carry out eye measurements with an unprecedented degree of precision is now being rolled out across the UK by lens specialist Rodenstock.

The DNEye® Scanner, which has already proved a huge success in Germany, Austria, Switzerland and, more recently, in Scandinavia, will provide more opportunities for independents to differentiate themselves in the market says Rodenstock’s Lens Product Manager, Debbie Bathgate.

“Compared to conventional aberrometers, the DNEye® Scanner registers lower and higher order aberrations of the eye for both near and far vision, as well as the brightness-dependent changes of the pupils, to allow 100% exploitation of a customer’s vision potential,” she adds.

“No eye is perfect but every eye can be perfectly measured. In the ideal eye, the light entering in the form of an ideal wavefront projects a precise image on to the retina. But that is only theory. In real life, each eye shows lower and higher order aberrations. These lead to a deformation of the wavefront entering the eye, which blurs the image projected on to the retina.

“The size of the pupil depends on various factors. For example, everyone is familiar with the effect of glare: the pupils constrict immediately. When there is less light the pupils dilate again. However, in terms of lens optimisation, what is more important is the near reflex – i.e. the interconnection between accommodation, convergence and constriction of the pupil.

“When we look at something up close, the pupil constricts. As a rule, the larger the pupil, the stronger the influence of the higher order aberrations on the vision quality,” adds Debbie.

“These deviations are registered by the DNEye® Scanner and are used by Rodenstock for lens optimisation. With DNEye® Rodenstock has developed an analytical calculation method for lower and higher order aberrations. These measurements contain vital additional information about your customer’s visual system and Rodenstock then uses all these parameters to calculate the ideal lens.

“The ideal spherical and cylindrical correction values are calculated for every viewing direction and every pupil size. The result of this highly complex optimisation technology is a lens that offers the wearer optimal correction in every visual point.”

The advantages of the DNEye® Scanner:

• High resolution wavefront analysis with brightness-dependent pupillometrics
• Includes corneal topography and autorefractometer function
• Takes near and far vision into account
• Completely automated, operator-independent measurement by means of real-time eye-tracking
• Visualisation of the wavefronts and simulation of ametropia
• Precision transfer to within 1/100 dioptres thanks to WinFit® reference port

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