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.
Fine organic particles in the atmosphere are more often solid glass beads than liquid oil droplets
21.04.2017 | Max-Planck-Institut für Chemie
Study overturns seminal research about the developing nervous system
21.04.2017 | University of California - Los Angeles Health Sciences
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
Two researchers at Heidelberg University have developed a model system that enables a better understanding of the processes in a quantum-physical experiment...
Glaciers might seem rather inhospitable environments. However, they are home to a diverse and vibrant microbial community. It’s becoming increasingly clear that they play a bigger role in the carbon cycle than previously thought.
A new study, now published in the journal Nature Geoscience, shows how microbial communities in melting glaciers contribute to the Earth’s carbon cycle, a...
20.04.2017 | Event News
18.04.2017 | Event News
03.04.2017 | Event News
21.04.2017 | Physics and Astronomy
21.04.2017 | Health and Medicine
21.04.2017 | Physics and Astronomy