"Eye scan" a promising option for early detection of central nervous system disorders

October 11, 2018 by Johannes Angerer, Medical University of Vienna
Credit: CC0 Public Domain

Partners from Austria, Germany, France and the Netherlands are taking part in the EU MOON project to develop new techniques for early diagnosis of age-related diseases of the eye and central nervous system, and successfully apply them in treatment and diagnosis. At 18 months from the start of MOON, researchers are confident that, in the future, it will be possible to use an eye scan to diagnose diseases such as Alzheimer's or to detect aggressive forms of age-related macular degeneration at an early stage – based on structural and molecular tissue changes on the retina.

"The first concrete results from this project are not expected until the first quarter of 2019 but preliminary investigations are highly promising and suggest that we will be able to obtain high-resolution data about the structure of the retina in future and information about its molecular composition," says Rainer Leitgeb, Project Leader from the Center for Biomedical Physics at the Medical University of Vienna.

Molecular look into the human eye

To achieve this, the research team is using a combination of several complementary optical techniques, which provide detailed information about the condition of the eye tissue: highly sensitive molecular Raman spectroscopy is combined with (OCT). In a matter of seconds, this produces high-resolution images from all layers of the retina – including all the information about their . Using this data, it will be possible, in future, to make a definitive diagnosis and detect neurodegenerative diseases at an . "The earlier, the better the patient's chances are," emphasises Leitgeb. "It would be wrong to anticipate the results. But one thing is clear: it is possible to take a molecular look into the ."

And it is quicker and less invasive than ever before: "Neurodegenerative diseases not only damage the brain but also cause changes in the retina. With our technique, which operates with light, we no longer need to look into the brain. Our goal is for a patient to be able to sit in front of the equipment, have their eye scanned contact-free and be given a reliable diagnosis in only a few minutes," explains the MOON project leader from Vienna.

Experts estimate that the number of people worldwide affected by will double over the next 30 years, which would be a huge burden for the healthcare system. "However, if we can delay the onset of Alzheimer's by five years, this is not only a huge benefit to sufferers and their families but would also save resources on intensive treatment. Here we are talking about billions of euros. The focus of our research therefore mirrors the strategic direction of Horizon 2020: we are working on the solution to a huge societal challenge."

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