Speaker and Abstracts

Lecture Abstracts

CL Lectures, Friday, 28th April 2017

3D Printing – A new Brick in the Optic Industry, Kyriakis Tsilavis:
3D printing, also known as additive manufacturing – refers to processes used to synthesize a three dimensional object in which successive layers of material are formed under computer control to create an object. Objects can be of almost any shape or geometry and are produced using digital model data from a 3D Model or another electronic data source such as an Additive Manufacturing File (AMF) file.
Although 3D Printing exists almost 20 years, over the last years this technology has entered in our life to change the way that we think about what is possible and what isn’t. From simple and unnecessary models, to saving lives through medical implants, 3D printing has changed our limits. Every year hundreds of new companies are developing new printers and new materials. From 3D print we are going to 4D print and the development is still going.

Scleral Lenses – Current Research to date and what we need to learn, Dr Lynette Johns:
Scleral lenses are an increasingly popular lens modality to manage irregular corneas and ocular surface disease. Research had primarily focused on the indications for use. Current research is exploring oxygen deprivation and complications. As the scleral lens industry continues to expand, studies are needed for the safety and effectiveness of scleral lenses as a treatment for diseased corneas and normal corneas. We will review the studies to date and discuss possible areas of research that need to be funded and shared to advance our knowledge and continued utilization of these lenses.

Beginners Guide for Audits with Focus on Technical Documentation, Helga Seiler:
To place contact lenses on the market the essential requirements for a manufacturer are:
• an implemented quality management system
• a product file for each product type.
For the purposes of this presentation it is assumed you have a quality management system already implemented for the processes of your company.
A part of that system is correct technical documentation in accordance with the regulatory directives. Here we explore: What is necessary to create adequate technical documentation? Why is biocompatibility testing necessary for each manufacturer? Why are clinical tests necessary and how do you set up a clinincal trial?

Contact Lenses, IOLs and the Physiology of Vision, Dr. Andreas Berke:
The optical apparatus of the eye does not project an image onto the retina, but an illumination pattern. The visual system is faced with two tasks. It has to structure the visual field into objects and to differentiate between objects and background. Lines, contours, colors, movement and binocular disparity are different aspects of visual perception, that are processed at different cortical structures. They have to be merged to perceive one single object, a process that yet is not really understood (binding problem). Multifocal contact lenses and IOLs do not generate two or more retinal images, but a retinal illumination pattern that is much more complex compared to the illumination pattern of monofocal lenses or spectacles. Especially elderly with age related loss of cognitive capabilities may have problems to extract a clear perceived image from these degraded illumination patterns.

Understandig Soft Lens Behaviour On-Eye – what are we actually fitting?,  Eef van der Worp:
Eye care practitioners have limited tools available to optimally fit, or choose, the first soft trial lens in clinical practice. To the surprise of some and the discontent of others, central keratometry values are not very useful in fitting soft lenses. Potential ways to better fit a soft lens to the ocular surface will be discussed in this session. But how do we actually evaluate whether a soft lens ‘fits well’ to the eye? What does ‘lens movement’ mean? And: how do we know and assess whether a change we make to a soft lens actually makes a difference? These topics will be explored in this presentation. ‘Not knowing’ as such is not the problem; ‘not realizing’ our shortcomings is worse.’ Without wanting trying to be overly dramatic; the future of our profession as contact lens professionals may be at stake to some degree here.

Business Session/ Workshop, Saturday, 29th April 2017

Playing to Win – Upgrading your Performance., Brad Waldron:
One of the biggest challenges of leading a business is to keep a growth trajectory. As our market place gets more sophisticated and our clients get more demanding we must continually upgrade our leadership habits, our team’s culture and how we serve our clients.
This engaging workshop will share with you the three natural growth and performance factors that build or destroy a company’s performance and profitability. How to create the conditions to thrive and get the best buy­in from the people you lead to create the culture that will enable you to perform at your best.
Participants will:
Be able to evaluate how effective your leadership is with your team and employees.
Identify the six Traps of Leadership ­ and your own Achilles heel.
Put in place an immediate and effective plan that will help you Thrive as a leader.
Take back to the work place a set of tools that you can share with your management team and employees.
Identify the cultural ‘blockers’ to Thriving Leadership and how to eradicate them.
This workshop is highly engaging and littered with interactive group work, insightful presentation and personal applications. As a consequence, everyone will have their own personal Thriving Leadership Toolbox to take back into the work place.
This Workshop is kindly supported by Contamac.

IOL Session, Saturday 29th April 2017

IOL Calculation – what we knew, what we know and what we need, Prof. Dr Paul-Rolf Preussner:
Already at the beginning of IOL calculations in 1967 it was known that the human eye with its highly vaulted surfaces is poorly described by Gaussi- an optics, in particular in the simplification of a system of two thin lenses. The high systematic errors of this approach needed fudging corrections in order to achieve at least realistic results on average. Terms only valid in the limits of Gaussian optics, e.g. “power”, were used where they are physically no longer defined, and the perpetuation of such unsuitable approaches until now induced many confusions and unneccessary discussions. IOL calculati- on should use state-of-the-art physical methods (raytracing), based on the data of instruments measuring as many optical details of the human eye as possible. However, also these instruments and their application are still subject of developments to achieve all data with sufficent accuracy.

Multifocal and Extended Depth of Focus IOLs: the translation from optical bench to patient perception, Prof. Dr Gerd U. Auffarth:
Recent advances in IOL technology and the introduction of new intraocular lens models with advanced optics have given ophthalmic surgeons the opportunity to choose from a variety of optical designs, which can influence the postoperative quality of vision in different ways. At the David J Apple Laboratory in Heidelberg, Germany, we have examined the optical quality of diffractive bifocal and trifocal multifocal IOLs as well as the new generation of Extended Depth of Focus lenses. Measuring the lenses in vitro, using modern IOL metrology equipment, we can get laboratory results which we can then correlate with our experience of clinical outcomes such as the objective measurement of a patient’s visual results and reading speeds as well as the patient’s subjective comments about the lens and his or her vision. The side effects from light loss and light scatter in some IOL models can especially affect a patient’s continued acceptance of the implant they received. The role of the human brain’s neuro-adaptation after these lenses are implanted is also not to be overlooked or underestimated. We find that there can be wide discrepancies between the laboratory results on the one hand and on the other, the clinical measurements and observations.

Experiences and Needs with Phacic IOLs, Dr Dimitrii Dementiev:
Implantation of phakic intraocular lenses (pIOLs) is a reversible refractive procedure, preserving the patient’s accommodative function with minimal induction of higher order aberrations compared with corneal photoablative procedures. Despite this, as an intraocular procedure, it has potential risks such as cataracts, chronic uveitis, pupil ovalization, corneal endothelial cell loss, pigmentary dispersion syndrome, pupillary block glaucoma, astigmatism, or endophthalmitis.
History and data review in the field of phakic intraocular lens implantation will be presented with information on patient, eye, and IOL selection, surgical techniques, and management of intra- and postoperative complications. Particular attention will be paid to the more critical issues of different models of phakic intraocular lenses, safety guidelines will be discussed . A comprehensive, competitive analysis of different phakic intraocular lens model designs and materials for safety in long term follow up will be included.

Intraocular Lenses: Achievements, Disappointments and Expectations, Dr Martin Hlozanek:
Excellent results of lens surgery as well as modern life style lead to high requirements on quality of vision and restoring of focusing ability. Despite many improvements there are still problems with monofocal IOLs (dysphotopsia, glistening, refractive surprises) and also no IOL is able to compensate the accommodation. People with bi-, tri- or polyfocal implants frequently suffer from optical disturbances, loss of contrast sensitivity and non-continuous focusing, accommodative lenses are often difficult to implant or they offer insufficient extent of focusing. What we expect from future IOLs?

New Medical Device Regulation (MDR), Helga Seiler:
One year ago the new Medical Device standard ISO 13485 was released, which generated additional work for the contact lens manufacturers to update their quality management system. Additionally, the old medical device directive (MDD) 93/42 EEG will be replaced by the new MDR. Instead of 60 pages in the old MDD we have now 354 pages in the new MDR, with many more requirements and new challenges.
This presentation will provide an overview about the more important requirements and what they mean.

Meet the Speaker

Prof. Dr Gerd U. Auffarth
AuffarthProf. Dr med. Gerd U. Auffarth, MD, FEBO is Professor and chairman at the Dept. of Ophthalmology, head of the IVCRC (International Vision Correction Research Centre) and of the David J Apple Laboratory for Ocular Pathology at the University of Heidelberg, Germany. His core competence includes cataract and intraocular lens surgery, IOL-biomaterial laboratory research, refractive surgery and application of Femtosecond laser in ophthalmology, ocular pathology. Minimal invasive glaucoma surgery, glaucoma implants and Stents, all corneal surgery including all types of corneal transplantation.
Prof. Auffarth has received more than 130 prizes and awards for his scientific work and has given more than 1300 lectures and presentations at various conferences worldwide.

Dr Andreas Berke


Dr rer. nat. Andreas Berke is director of the Cologne College of Ophthalmic Optics and Chairman of the Board of Examiners of the ECOO European Diploma. He had published several specialised books.


Dr. Dimitrii Dementiev

161204-dementiev-photo-ddDimitrii Dementiev M.D, is an Eye Surgeon, the Founder, Medical director, Board of Directors, Chief Surgeon at International Center for Ophthalmology, a private practice clinic and medical supply center in Moscow Russia and Blue Eye-Centro di Microchirugia Oculare” a private practice eye center in Milan, Italy. Dr. Dementiev has expertise in cataract and laser refractive surgery, phakic refractive lens, premium IOLs (multifocal and toric IOLs), clear lens extraction, Complex Keratoconus treatment, glaucoma (anti-glaucomatous device iStent and Express), the different types of keratoplasty including Femto assisted keratoplasty; Optical scanning diagnostics with the Carl Zeiss OCT and VISANTE. Member of American Academy of Opthalmology AAO since 1997, (2014 AAO achievement award), American and European Society Cataract and Refractive Surgery, Societa Oculistica Italiana, International Society of Refractive Surgery, Keratomilieusis study Group.

Dr. Martin Hlozanek, M.D., Ph.D., FEBO

hlozank-martin-img_4425-kopf1992-1999: M.D., Charles University, 2nd Medical Faculty
Since 1999: Clinic of Ophthalmology for Children and Adults, University Hospital Motol
2013 Fellow of European Board of Ophthalmology (FEBO, Paris)
2016 Ph.D. in medical biophysics at Charles University
Observerships: Rotterdam, Ottawa, Houston
Present position (since 2014): Senior ophthalmologist, Clinic of Ophthalmology, University Hospital Královské Vinohrady, Charles University, Prague
Specialization: cataract in children and adults

Dr. Lynette Johns

Baker StudiosDr. Johns is a residency trained optometrist. She formerly was the senior optometrist at the Boston Foundation for Sight with Dr. Perry Rosenthal designing scleral lenses. Currently, she is an adjunct assistant professor and clinical attending at the New England College of Optometry. She is a consultant to the Specialty Vision Products group of Bausch + Lomb. Dr. Johns is a fellow of the American Academy of Optometry, the Scleral Lens Education Society and the British Contact Lens Association.

Prof. Paul-Rolf Preußner, MD, PhD

161109-preussner-foto-kopie1969-1977 Study of Physics at the Universities of Cologne and Bonn, Diploma, PhD in Theoretical Astrophysics (1974), working at the Institute of Theoretical Astrophysics of the University of Bonn.  1977-1987 Working in space technology at the Astronomical Institute of University of Tuebingen, study of medicine in parallel, MD.  Since 1988 Specialization in Ophthalmology at University Eye Hospital of Mainz, Professor in Ophthalmology, technical development.

Quantification of retinal blood flow, eye tracker for refractive corneal;
Laser, computer expert system for subjective refraction (SARA), realtime;
Dosage controlled cyclophotocoagulation (COCO), ray-tracing ofthe pseudophakic eye (OKULIX), pattern-noise Glaucoma diagnostic (PANO);
Since 2005 Cooperarion with Presbyterian Eye Services Cameroun, joint projects on corneal crosslinking, Glaucoma diagnostics, Glaucoma therapy and Cataract surgery.

Helga Seiler
Helga Seiler _Photo Helga Seiler is a trained optometrist (Germany) and worked since 1996 as a contact lens specialist in Munich. In 2007 Helga joined the contact lens industry working in Professional Services and as a contact lens specialist in Switzerland. Helga completed her Master’s degree in Aalen (Germany) in 2013. In fitting contact lenses Helga focuses specifically on presbyopia, keratokonus, keratoplasty and ortho-k. During the past 3 years Helga has undertaken a complete transformation of the QMS at Prolens AG, Zurich and has full responsibility for managing the system. Helga continues to expand her quality management knowledge through on-going education.

Kyriakos Tsilavis

161214-tsilavis-kyriakos-kopfKyriakos Tsilavis was born on 02.07.1984 in Athens, Greece. He studied at the University of Teilar where he took his Bachelor Degree as Wood Technician and Furniture Designer. In 2008 made a 6 month internship at the Mendel University of Brno, Czech Republic. After finishing his internship, he worked as an operator of CNC machine for an enterprise of kitchen furniture in Athens for 3 years.
In April 2012 joined the team of Digitalwerkstatt GmbH in Basel, Switzerland, where he started as 3D Designer for the preparation of 3D printed models. At the moment he is the Production Manager and his main activity is the quality control and finding solutions for projects that matching the costumers needs.

Brad Waldron
161116-brad-waldronBrad Waldron, an industrial leader. Equally effective leading a business to drive performance or developing specialist teams and individuals to achieve greater performance and results, Brad has a proven record of helping others to succeed. In Australia, the USA and Europe Brad has helped a wide range of businesses grow, re-launch, and flourish. His experience has taken him from launching Sony’s latest and best smart phone (Xperia Z-Z5) onto the world’s stage to helping leading sports world champions launch and promote their charities for children suffering with cancer and corporate sustainability (Ellen MacArthur Trust). He provides a unique perspective in that he reigns from a dual exposure to winning – winning in business and winning in the sports arena. He harnesses a rare combination of insight, humour and practical strategies to increase performance whilst enabling people to gain more fulfillment from their work role. His work assignments have led him to living and working in Australia, the USA and the United Kingdom. He has worked with international peak performance coach Anthony Robbins in the UK and USA, was the UK MD of the Covey Leadership Centre. He speaks frequently to CEOs, business leaders and organisations on business development, the new corporate paradigm, leadership and entrepreneurship.
In 2012 and 2013 he won the OutPerformer of the Year award for speaking services from Vistage International – the Global forum for Chief Executive Officers.
He is the author of Present Naked – How to deliver presentations with Substance and Sizzle.
A native Australian who has spent more time living abroad than in Australia – Aussies consider him a tourist!
This Workshop is kindly supported by Contamac.

Eef van der Worp

van der Worp copyEef van der Worp, BOptom, PhD, FAAO, FIACLE, FBCLA, FSLS,  is an educator and researcher. He received his optometry degree from the Hogeschool van Utrecht in the Netherlands (NL) and his PhD from the University of Maastricht (NL). Eef is adjunct assistant Professor at Pacific University College of Optometry (Oregon, USA), and affiliated with the University of Maastricht as an associate researcher and adjunct Professor at the University of Montreal University College of Optometry (CA).