2024-04-23 13:24:31
Around 24 million people worldwide suffer from it dementia, with about 60 percent of patients, Alzheimer’s is the most common form of the disease. Most of those affected become ill when they are over 70 years old. However, in some cases the disease occurs earlier. This is precisely when Alzheimer’s often begins with forgetfulness.
Vision problems may be a sign of dementia
Even before brain decline begins, the eyes can signal dementia, according to a recent study he found out yes. The research team from Loughborough University in England looked at 8,623 healthy people over a period of twelve years. At the end of the study, 537 participants had developed dementia. It was then examined which factors the patients had in common. The result: almost all those affected had vision problems years before.
At the beginning of the study, the participants were asked to perform a visual sensitivity test. They had to press a button as soon as they saw a triangle form in a field of moving dots. People with dementia saw this triangle much more slowly. Scientists have already found a possible explanation for this connection.
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Patients have problems distinguishing colors
The cause may be the toxic amyloid deposits, which are often associated with Alzheimer’s disease gave get up These often affect areas of the brain responsible for vision. It is only later in the course of the disease that the parts of the brain associated with memory are damaged. So vision tests can find deficits before memory tests can.
The study also found that the disease also affects other aspects of visual processing, such as being able to clearly see the outline of objects or distinguish between certain colors. In particular, the ability to recognize the blue-green spectrum is impaired early in dementia. Another possible early symptom is a lack of “clumsy control” of eye movements. This means that people with Alzheimer’s seem to have a problem ignoring distracting stimuli, which results in uncontrolled eye movements.
Quellen: Alzheimer-Demenz Deutschland, “Visual processing speed and its relation to the future development of dementia in a prospective population-based cohort: EPIC-Norfolk” (PubMed, 2024)
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