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.
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.
Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery
20.01.2017 | GSI Helmholtzzentrum für Schwerionenforschung GmbH
Seeking structure with metagenome sequences
20.01.2017 | DOE/Joint Genome Institute
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
20.01.2017 | Awards Funding
20.01.2017 | Materials Sciences
20.01.2017 | Life Sciences