Manufacturer's Forum

Lectures 2018

Industry 4.0 in an optical lab: a case study

Xavier Bultez, Satisloh

Industry 4.0 in an optical lab: a case study. This talk briefly explains the meaning of Industrie 4.0 and why it is coined as the 4th industrial revolution. It then explains how Industrie 4.0 principles can be implemented in an optical lab in a holistic approach. Next a detailed case study of such an implementation of Industry 4.0 principles in an actual greenfield production lab will be presented. First results, successes and initial learnings will be discussed.


The first optical measurements with flawless 3D sizing

Sebastian Peña-Feldmann, Luneau Technology

Over the past years the tracing technology has continuously improved. New technologies as the tilting stylus enables binocular tracing of frames with higher base curves. New mechanisms apply less pressure on the frame, maintaining the frame in “good shape”. Today, when using those technologies, excellent first fit rates are reached.

In case of the demo lens tracing, which is commonly used for drill mounts as well as for semi-rimless (Nylor – Supra) frames, but also when frames “collapse” after the demo lens is taken out, the first-fit rate is still far from perfect, causing trouble in the finishing industry. Even when optical tracing has brought an advantage – no calibration, quicker - the results are still less reliable and precise than in mechanical frame tracing.

To achieve perfect results in demo lens tracing a new way of tracing is required, which works perfectly independent of the user, shape and/or frame base curve. The goal of the presentation is to show the reasons why demo lens tracing is inconsistent today. Then to present a new, revolutionary tracing method that overcomes this lack in precision, improving the first fit rate also for all cases where it is required to trace the demo lens.


3D printing: bringing smart to eyewear

Guido Groet, Luxexcel

3D printed spectacle lenses? What many experts considered a utopia just a few years ago has now become reality; the technology is now being commercialized for specialty lenses. 3D printing has made significant steps in all industries and has positioned itself to deliver functional and customized products that open avenues for entirely new applications.

One of the amazing things 3D printing of lenses can bring is “smart”. When you look at your smartphone, it is very different from the phone you used 20 years ago. When you look at your glasses they are very similar. The difference between the two is adding “smart” to the product. 3D printing will enable ophthalmic labs to integrate all kind of electronics, sensors, filters, etc. inside the lens, making glasses “smart” and providing the user with added functionality.

The concept of adding “smart” to products can be seen as one of the major technology trends in 2018. According to research smart eyewear like AR (augmented reality) and VR (virtual reality) technologies are positioned for record growth in 2018 and beyond and are considered as the next big application area for customized ophthalmic lenses.  During the lecture Guido Groet, Chief Commercial Officer Luxexcel, will provide insights in how to bring smart to eyewear and the possibilities this offers ophthalmic labs.


Surface smoothing and applications to freeform lenses

Khalid Harrar

The fundamental principles of surface processing give rise to a wide range of useful tools that can be applied to freeform lenses. In this lecture, we will discuss the surface smoothing process in general and will give two examples of it, filtering and fairing with Remarks on the implementation and results. At the end, we will give an application to the design of progressive addition lenses.


Mean Power effect in PAL users

José Miguel Cleva , IOT

Astigmatism is a mainfactor in the visual perception when using a lens, spherical power errors in the lateral parts of the lens also have a significant impact on the lens performance. The combination of spherical and cylindrical powers is key for the defocus perceived by a user and the drop of the visual acuity in the periphery of the lens. To study the influence of the mean sphere distribution a wearer trial was designed comparing two designs, with similar astigmatism distribution, but different mean sphere distributions in the lateral parts of the lens. By means of these two designs, the effect of the spherical power distribution was isolated and studied to determine the influence on the wearer satisfaction. The results showed improved performance with a design when the mean spherical power tended to be zero or, even negative, in the lateral parts of the lens. When calculating the perceived visual fields, the distance visual field affected by this change was found to be larger and visual acuity was found to be better in the lateral parts of the lens.


Comparison of the structure of different Optic markets in 2017, with a focus on Eyewear, outlook on the combined sales of Frames and Spectacle Lenses in the German market

Till Herzog, GfK

  • Which Product Groups drive the markets
  • Sales and price performance for spectacle lenses in different markets
  • Which product feature drive the markets in units and in price, focus on progressive lenses and refraction indexes
  • Interaction between Spectacle Frame and Spectacle lens characteristics, concerning product features and sales price


Prismatic effect - Revisited

Mo Jalie, University of Ulster

The prismatic effect produced upon an incident pencil of light when a lens is decentred before the eye is given by the well known rule attributed to C.F. Prentice, P = c F. This value predicts the deviation produced by the lens upon an incoming ray of light. It does not inform upon the prismatic effect which the decentration has imposed upon the eye, that is, the ocular rotation which is required to view a given object. The latter value, however, can be found from a simple modified form of Prentice’s law in the form P = c' F, where c' represents the effective decentration of the lens. The effective decentration is found from knowledge of the lens-eye separation, in the form of the centre of rotation distance, and the power of the lens. In practice, it is the prismatic effect imposed by the lens upon the eye, in other words the resulting ocular rotation, which is important when, say, deciding whether some form of prism control is required in near vision. This method of finding the ocular rotation gives rise to a simple method for determining the ocular rotation in the general case of oblique cylindrical corrections.


Industry 4.0 & LMS: Review & Challenge

Bernd Freyermuth, Lensware

The lecture will concentrate on reviewing the development of IT assisted solutions (keyword “digitalization”) in industrial ophtalmic labs over the last 3 decades. Therefore some historical examples will be given by the lecturer, based on his own personal experience. Due to the availability of digitalization technologies, there had been everlasting requirements for the increase of automation in the different areas of the industrial ophthalmic labs (keyword “business intelligence”). This lead to a stepwise integration of all business and production related IT processes. Finally today, more or less all vital business processes of ophtalmic labs are executed or at least assisted by software systems. A lab management system today is of highest complexity, transforming each kind of data through the organization. This process had been recently characterized by the designation “Industry 4.0”, while this expression should include administrational, commercial and operational processes. Various different IT technologies are applied to achieve this target.

Derived from the basic hierarchical company structure of a lab, the stepwise digitalization of processes is described, while integration and a certain standardization took place. The development of such solutions for the ophthalmic industry is an highly interdisciplinary issue, combining the deep knowledge of ophthalmology with IT technology and cybernectical know how in a strictly structured approach. Only the application of this knowledge combination could result in satisfying solutions, driven by globalization and enhanced supply chain management issues. The contribution will gradually expand the core model of the LMS by those “added features”. From the experience of multiple projects with small, midsized and large labs, an optimal LMS IT architecture will be propagated as kind of “standard” for the ophthalmic industry.

Today lab management systems can no longer be recognized as “software packages”, but have to be considered as “complex software solutions”, that comprise much more then installation of some binaries on some servers to execute some kind of logic. The complete range of everlasting project and change management, as well as the consultation and support services are integral part of the fast growing digitalization in all kind of processes.

Finally it will be emphasized, that despite a standard core architecture can be postulated, the requirements of small and large labs might differ significantly from operations point of view. The lecture will prevent from explanation of any IT related technologies.


Edging 4.0

Fabio Verzeri, MEI

The Milling revolution combined with digitalization as a key factor to enable a step forward in the edging process for the entire Optical Market: an opportunity to turn into reality the Industry 4.0 smart factory principles.





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