Manufacturer's Forum

Lectures 2017

Design of aspheric lenses

Mo Jalie, University of Ulster

Before 1985, aspherical surfaces were used only for post-cataract spectacle lenses and high-power magnifiers. Today, aspherical surfaces are used by all major lens manufacturers to produce thinner, lighter and more attractive best form lenses in the normal power range.
Aspherical surfaces are employed because the surface itself is astigmatic and the surface astigmatism is used to combat aberrational astigmatism due to oblique incidence. The use of an aspherical surface gives the lens designer a new freedom to design spectacle lenses without the restrictions imposed by spherical surfaces and this presentation describes the various types of aspherical surfaces and how the surface astigmatism arises before considering how to calculate the required asphericity and how this feature is used to produce flatter, thinner lenses.
In the case of astigmatic prescriptions, the surface requires different asphericities along its principal meridians and the geometry of these atoroidal surfaces and their use in the design of bi-aspheric lenses is also described.

 

How new technologies help to exploit the potentials of the spectacle lens markets, related to sales units and sell out price

Gianni Cossar & Till Herzog, GfK

- Market trends for different Optic Markets in Europe and Asia
- 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
- How perform new technologies and marketing activities within the spectacle lens markets , deep dive on proximity lenses and driving lenses and wellness lenses In selected markets.

 

Wavelength control technology for healthy eyes

Wim Bos, Mitsui Chemicals

Mitsui Chemicals has developed raw materials for ophthalmic products that absorb part of the High Energy Visible (HEV) segment of visible light, in particular in the range of 400 to 420 nm, in addition to UV light. The technology has been designed for incorporation in ophthalmic lenses in a way that provides for a neutral colored, clear and esthetically nice appearance. Several studies carried out on the effects of HEV light on the retina have suggested that cutting blue light may help to maintain healthy eyes.
The Mitsui technology adds additional aspects to the ‘blue cut’ technology based on coatings, in which blue light is reflected. In the product, the in-mass technology leads to the absorption of a considerable proportion of HEV. Due to its unique in-mass technology, it is combinable with the blue cut coating technology in one system. This allows cutting blue light to the desired levels.
The notion to protect beyond UV400 – which is currently widely accepted – to UV420 seems to be important for providing even greater protection for our eyes.

 

The science of Blue Light: Protecting patients in today’s digital world

Greg Naes, BluTechLens

In today’s digital world we are surrounded 24/7 by blue light. The digital revolution has launched a global awareness of the visual and health effects of blue light. At the same time patients have been exposed to a wealth of information that may be ‘marketing correct’, but not necessarily ‘medically correct’. As a result of certain misinformation many patients have been given a false sense of security when it comes to protection.
This revolutionary workshop hosted by the industry leader in blue light protection for over six years will examine fact vs. fiction, differences in blue light solution, and clinical best practices to protect patients of all ages. The fact and fiction portion will examine the impact of blue light using independent peer reviewed science with proper interpretation from some of the world’s leading ophthalmologists and retina researchers.
Following we will explain the differences in between today’s blue light solutions and how they can impact the challenges facing our patient’s today. The final portion of this workshop will provide an outline of those patient groups needing the highest level of protection along with proven clinical implementation strategies used worldwide.

 

AR coatings for complete eye protection: blue light and more

Gero Bongiorno, Satisloh

During the activities of everyday life, we are exposed to light coming from many different sources: from the sun, cell phone and TV screens, lamps etc. Light radiation from all these different kinds of sources is not always beneficial. In particular, blue and ultraviolet light can become dangerous over a long period and the natural defenses that our eyes already possess are not always effective (eyelid-closing reflex, pupil diameter control, adaptation of retina to light intensity). Ultraviolet light can induce ocular irritation and sometimes irreversible lesions, leading to partial or total vision loss. Blue light, besides having a bad impact by inducing the deterioration of the retinal cells, also has a strong impact on the regulation of circadian rhythms, affecting people’s body clocks, which is responsible for sleep disorders and has an overall impact on health and wellness. In order to prevent these problems, it is therefore important to wear glasses that can reduce the amount of harmful light radiation reaching the eyes, to minimize negative effects on people’s health.
This lecture focuses on how it is possible to implement AR-coating solutions in order to obtain the maximum protection. In particular, how blue cut and UV protective AR coatings can be optimized and combined to reach a complete eye-protection package will be discussed.

 

Blue light-induced retinal photo-ageing and application in ophthalmic photoprotection

Coralie Barrau, Essilor

Blue light is highly suspected to be involved in retinal ageing and in age-related macular degeneration (AMD) onset or progression (Sui et al., 2013) (Marquioni et al., 2015). Blue light-induced toxicity has been largely studied on in vitro and in vivo models of AMD. However, the most toxic wavelengths within this broad range remained to be identified and valued in designing ophthalmic photoprotection.
Together, Paris Vision Institute and Essilor, under the supervision of Pr. Sahel and Dr. Picaud, investigated for the first time the precise phototoxic action spectrum on an AMD in vitro model in physiological light conditions (Arnault, Barrau et al., 2013). We also recently explored the spectral modulation of oxidative stress and cell defense mechanisms in the outer retina (Marie et al., ARVO 2015, 2016). All our findings provided us with precise tools to design the first ophthalmic selective filters with in vitro proven biological photoprotection potency. This perspective is a great step forward in terms of technological innovation and patient vision health protection.

 

Architecture of standard industrial Lab Management Systems

Jean-Paul Madaleno, LensWare

Industrial software solutions are key players of complex production organizations, eager to implement the highest efficiency through the different production stages. What makes our ophthalmic lab industry to be so challenging is related to the fact that, aside of producing on a large scale, our products are mainly processed on demand, and today with an extremely high level of customization. More, it is now an essential need to interconnect the different operative infrastructures, taking part of the whole supply chain: order management, production control, inventory, sales management, dispatching logistics, multi-locations. Such comprehensive system in a complex environment can only be conducted by an effective Lab Management System, and driven by the standardization of the optimal architecture.

During the presentation we will go through the different elements of the industrial Lab IT architecture, highlighting the main benefits of its modularity and scalability, pinpointing to a standardized core. Moreover, impressive achievements will be disclosed, allowing most efficient business expansion, while getting the entire data processing into the Industry 4.0, at an affordable level of invest in license and operation (total cost of ownership).

 

Twilight vision – Contrast – Glare; Fundamental physiological considerations

Fritz Passmann, HWK Dortmund

Glare is the mismatch between the eyes’ state of adaptation and the surrounding luminance. The presentation discusses photopic and mesopic vision and the ability of spectacle lenses to reduce troubling effects on vision.

 

How to create market space in the optical industry?

Mark Mackenzie, SwV – Strategy with Vision

Over the last 13 years what are the trends that led to growth? Can we use this knowledge to generate new markets for vision care in the future?

Mark Mackenzie of SWV will use the results of research carried out by SWV over the last 13 years to examine trends and products in different countries, which have led to the growth of the optical market.
Some of the questions that Mark will try to answer are:
- Are the trends of the past sustainable in the future?
- Are there lessons to be learnt from the marketing messages of yesterday?
- What were the storms in a tea cup and what were the real solutions to improve the growth of sales of vision care products?
- What are areas of potential demand which are at present possibly neglected or can be created by the optical industry?

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