Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Laser instead of Reading Glasses?

09.02.2016

Up to now, presbyopia is usually treated by wearing reading glasses. Different methods have also been tested to correct this form of defective vision with the laser. Now, the Laser Zentrum Hannover e.V. (LZH) is developing a virtual model together with two project partners, in which an especially gentle, laser-based surgical method can be simulated. In the so called fs-lentotomy method, the crystalline lens is made flexible again by performing micro-cuts with a femtosecond laser. The aim of the RayFEye project is to make the results of the eye surgery predictable.

The Image-Guided Laser Surgery Group of the Biomedical Optics Department is now developing an experimental setup in which the influence of the micro-cuts on the crystalline lens can be measured.


Applying micro-cuts in the lens in a stretcher.

Photo: LZH

The special feature of this complex setup is that it can stretch and unstretch a sample crystalline lens, an animal byproduct. Thus, different focus distances of the eye can be simulated. The scientists can measure the changes in the beam path (ray tracing) through the lens both before and after the micro-cuts in the eye have been made.

Prior simulation of the surgery

With the results of these experiments, cutting patterns for the surgical correction of presbyopia can be determined and optimized. The cutting patterns and the measurement results of the experiments will then be entered into a software. This software creates a virtual lens model on which the surgical correction can be simulated prior to the surgery.

The goal of the project is to develop a surgical method in which presbyopia can be corrected in a gentle manner. Additionally, the software should be further developed to customize it for clinical use. It should be able to simulate surgeries a priori in order to improve the results of eye corrections.

Apart from the LZH, the Optimo Medical AG (formerly Integrated Scientific Services AG), which develops the OptimEyesTM software, and the ROWIAK GmbH as manufacturer of the complete laser system are involved in the project.

The project „Ray tracing in ophthalmic finite element models for predicting of visual acuity enhancement“ (RayFEye) is supported by the German Federal Ministry of Education and Research (BMBF) and the Swiss State Secretariat for Education, Research and Innovation (SBFI) within the framework of the Eurostars program.

Dr. Nadine Tinne | Laser Zentrum Hannover e.V.
Further information:
http://www.lzh.de/

More articles from Life Sciences:

nachricht What the world's tiniest 'monster truck' reveals
23.08.2017 | American Chemical Society

nachricht Treating arthritis with algae
23.08.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Fizzy soda water could be key to clean manufacture of flat wonder material: Graphene

Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.

As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...

Im Focus: Exotic quantum states made from light: Physicists create optical “wells” for a super-photon

Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.

Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...

Im Focus: Circular RNA linked to brain function

For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.

While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...

Im Focus: RAVAN CubeSat measures Earth's outgoing energy

An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.

The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...

Im Focus: Scientists shine new light on the “other high temperature superconductor”

A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.

Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Call for Papers – ICNFT 2018, 5th International Conference on New Forming Technology

16.08.2017 | Event News

Sustainability is the business model of tomorrow

04.08.2017 | Event News

Clash of Realities 2017: Registration now open. International Conference at TH Köln

26.07.2017 | Event News

 
Latest News

What the world's tiniest 'monster truck' reveals

23.08.2017 | Life Sciences

Treating arthritis with algae

23.08.2017 | Life Sciences

Witnessing turbulent motion in the atmosphere of a distant star

23.08.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>