Several laser-based operations are already established for correcting defective vision. However, this highly precise and yet gentle method cannot be used yet for presbyopia and for adhesions on the retina. In the project IKARUS the Laser Zentrum Hannover e.V. (LZH) and four project partners have combined femtosecond laser technology with optical coherence tomography (OCT) as well as adaptive optics, to expand the range of laser surgery.
In the established femtosecond laser-assisted in situ keratomileusis (fs LASIK), the cornea is cut open using the laser to subsequently correct the defective vision. In order to treat presbyopia however, the tissue has to be cut deeper.
The scientists at the LZH and their industrial partners use an fs laser for precisely cutting the lens, creating slip planes and thus making the lens more flexible.
Cutting the eye lens with the laser, without damage
This treatment becomes only possible through an effective visualization of the eye tissue. For this, the Image Guided Laser Surgery Group of the Biomedical Optics Department of the LZH has adapted an OCT imaging unit from the ROWIAK GmbH.
With this and a special software it is possible to image the cutting of the eye as well as the laser beam delivery during the operation. Within the project cuts into the eye have already been done without damaging neither the front nor the rear part of the lens capsule. In current clinical studies, the ROWIAK GmbH is further examining this process.
Removing retina adhesions, without opening the eye
In order to remove retina adhesions, currently the eye must be opened and the vitreous body removed. The scientists at the LZH have integrated adaptive optics into an fs laser system, to be able to cut close to the retina.
First results have already been established on the retina of pig eyes: with this system, model membranes only a few hundred micrometers away from the retina have been cut; the retina tissue directly behind it showed no noticeable damage.
In the project “Innovative cataract, presbyopia and retinal treatment using ultrashort laser pulses” (IKARUS), the following partners apart from the LZH and the ROWIAK GmbH (Hannover) as the system manufacturer have been involved: QIOPTIQ Photonics GmbH & Co. KG (Göttingen) as optics designers, ARGES GmbH (Wackersdorf) for laser scanner systems, and the Laserforum Köln e.V. (Cologne) for clinical consulting and for measuring of the eyes. IKARUS was supported by the German Federal Ministry of Education and Research (BMBF) within the research alliance “Ultrakurzpulslaser”.
Lena Bennefeld | Laser Zentrum Hannover e.V.
Scientists develop tiny tooth-mounted sensors that can track what you eat
22.03.2018 | Tufts University
NIH scientists describe potential antibody treatment for multidrug-resistant K. pneumoniae
14.03.2018 | NIH/National Institute of Allergy and Infectious Diseases
An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.
The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...
In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.
Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.
They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...
A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...
For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.
In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...
19.03.2018 | Event News
16.03.2018 | Event News
13.03.2018 | Event News
22.03.2018 | Trade Fair News
22.03.2018 | Earth Sciences
22.03.2018 | Earth Sciences