A new study says that getting an annual eye exam or wearing glasses or contacts can reduce the risk of dementia.

The study in JAMA Ophthalmology found that people with untreated visual impairments have a higher chance of developing dementia.

Researchers looked at data from 3,000 people ages 71 and older.

Participants were given tests for near and distance vision, contrast sensitivity and screened for dementia.

The results concluded that 12% of participants showed signs of the illness. For people with impaired distance vision that number rose to 20%

Participants who have impaired up-close vision, 21% showed signs of dementia.

For those with more severe visual impairments or who blind, they are 33% more likely to show signs of dementia.