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Alzheimer's can be diagnosed with eye test
Saturday August 25, 2012 09:16:36 AM,
IANS
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London: Now
Alzheimer's can be diagnosed with a simple eye test, according to
researchers.
Trevor Crawford, psychologist from the Centre for Ageing Research,
Lancaster University, said: "The diagnosis of Alzheimer's disease
is currently heavily dependent on the results of a series of
lengthy neuropsychological tests."
"However, patients with a dementia often find that these tests are
difficult to complete due to a lack of clear understanding and
lapse in their attention or motivation," he said.
During the study, 18 Alzheimer's patients, 25 of Parkinson's, 17
healthy young people and 18 healthy older people were asked to
follow the movements of light on a computer monitor. In some
instances they were asked to look away from the light, the
Telegraph reported.
Detailed eye-tracking measurements showed stark contrasts in
results. Patients with Alzheimer's made errors on the task when
they were asked to look away from the light. They were unable
correct those errors, despite being able to respond normally when
they were asked to look towards the light.
These uncorrected errors were 10 times more frequent in the
Alzheimer's patients than in the non alzheimers' groups.
Researchers also measured memory function among those Alzheimer's
patients who found the test difficult and were able to show a
clear correlation with lower memory function.
"The light tracking test could play a vital role in the diagnosis
of Alzheimer's," Crawford added.
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