Now, a new technique to detect onset of blindness!
Washington: Scientists have developed a new technique which they claim will help detect healthy people at risk of developing age-related macular degeneration (AMD),
one of the leading causes of blindness worldwide.
Using standard clinical techniques, the detection of AMD has previously not been possible in the disease`s early stages. Doctors tend to diagnose AMD once small changes become visible at the back of a patient`s eye. However, degeneration
begins many years before these clinical signs appear.
Now, a team at Queensland University of Technology, led by eye specialist Dr Beatrix Feigl, has come up with the "dim light vision" test which it says is very sensitive to
early changes in a person`s vision.
"We can detect subclinical visual impairment in healthy participants genetically at risk for AMD. In the future we hope this test might be utilised by ophthalmologists
and optometrists to identify patients with a high genetic risk of developing AMD but without any clinical signs of disease.
"This would enable specialists to advise patients on lifestyle changes which may delay disease onset and reduce its severity," she said.
Dr Feigl said that genetic pre-disposition accounted for around half the cases of AMD. However, lifestyle risk factors for AMD, which could be controlled by a patient,
included poor diet, lack of exercise and smoking.
"We know that lifestyle changes can decrease a person`s chance of getting worse forms of the disease," she said.
The next phase of the team`s research will be a longitudinal study, following up with people who took part in this study and who were shown to have early changes to their
vision. "We will follow them up and see if their vision deteriorates over time," she said.
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