Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Accurate eye operations using lasers and optical coherence tomograph

21.09.2015

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.


3-D OCT projection of an fs laser membrane cut (symbolic laser focus in red). The membrane in blue is only 300 µm from the prepared porcine retina in brown.

Illustration: LZH

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.
Further information:
http://www.lzh.de/

More articles from Health and Medicine:

nachricht New discoveries predict ability to forecast dementia from single molecule
12.12.2018 | UT Southwestern Medical Center

nachricht Pain: Perception and motor impulses arise in the brain independently of one another
12.12.2018 | Technische Universität München

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

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

Im Focus: Lethal combination: Drug cocktail turns off the juice to cancer cells

A widely used diabetes medication combined with an antihypertensive drug specifically inhibits tumor growth – this was discovered by researchers from the University of Basel’s Biozentrum two years ago. In a follow-up study, recently published in “Cell Reports”, the scientists report that this drug cocktail induces cancer cell death by switching off their energy supply.

The widely used anti-diabetes drug metformin not only reduces blood sugar but also has an anti-cancer effect. However, the metformin dose commonly used in the...

Im Focus: New Foldable Drone Flies through Narrow Holes in Rescue Missions

A research team from the University of Zurich has developed a new drone that can retract its propeller arms in flight and make itself small to fit through narrow gaps and holes. This is particularly useful when searching for victims of natural disasters.

Inspecting a damaged building after an earthquake or during a fire is exactly the kind of job that human rescuers would like drones to do for them. A flying...

Im Focus: Topological material switched off and on for the first time

Key advance for future topological transistors

Over the last decade, there has been much excitement about the discovery, recognised by the Nobel Prize in Physics only two years ago, that there are two types...

Im Focus: Researchers develop method to transfer entire 2D circuits to any smooth surface

What if a sensor sensing a thing could be part of the thing itself? Rice University engineers believe they have a two-dimensional solution to do just that.

Rice engineers led by materials scientists Pulickel Ajayan and Jun Lou have developed a method to make atom-flat sensors that seamlessly integrate with devices...

Im Focus: Three components on one chip

Scientists at the University of Stuttgart and the Karlsruhe Institute of Technology (KIT) succeed in important further development on the way to quantum Computers.

Quantum computers one day should be able to solve certain computing problems much faster than a classical computer. One of the most promising approaches is...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

ICTM Conference 2019: Digitization emerges as an engineering trend for turbomachinery construction

12.12.2018 | Event News

New Plastics Economy Investor Forum - Meeting Point for Innovations

10.12.2018 | Event News

EGU 2019 meeting: Media registration now open

06.12.2018 | Event News

 
Latest News

New discoveries predict ability to forecast dementia from single molecule

12.12.2018 | Health and Medicine

CCNY-Yale researchers make shape shifting cell breakthrough

12.12.2018 | Physics and Astronomy

Pain: Perception and motor impulses arise in the brain independently of one another

12.12.2018 | Health and Medicine

VideoLinks
Science & Research
Overview of more VideoLinks >>>