Scientists from the University of Michigan have found that vision loss and deterioration in people over the age of 71 may be associated with dementia. JAMA Ophthalmology.
Doctors analyzed data from nearly 3,000 U.S. citizens over the age of 71 who participated in the larger NHATS Study on Aging. They rated the participants’ near and far vision and how well they were able to distinguish objects against different backgrounds. The tests were carried out on tablets, and scientists have confirmed that this method, when done correctly, is not inferior to a regular doctor’s examination.
The analysis showed that participants with even minor vision loss were more likely to suffer from dementia than people without vision problems. Dementia symptoms were observed in 12.3% of all individuals participating in the study. Dementia was found in 19.5% of patients with myopia and signs of hyperopia in 21.5%. Dementia occurred in 32.9% of people with moderate to severe visual impairment (including vision loss).
Up to 40% of dementia cases can be caused by 12 risk factors that people can influence. It includes smoking, hypertension, and hearing loss. New data can be added to the list of such visual impairment factors. If a causal relationship is confirmed in future studies, it could mean that people who take steps to minimize vision problems as they age may have a lower risk of dementia.
ancient scientists to solveHow to identify early signs of dementia in a person’s eyes.