There are a number of different types of dementia, and the most common in the UK is Alzheimer’s disease.
Diagnosing the condition early could help to slow down the condition’s progress.
Making some small lifestyle changes could lower your chances of developing Alzheimer’s in later life.
You may be at risk of dementia if you struggle to distinguish between colours.
“Certain diseases that affect the brain, including Alzheimer’s, can influence the brain’s interpretation of images being received by the eyes,” said the US healthcare practice Kadrmas Eye Care New England.
“In addition, vision problems, such as cataracts or changes in eyesight, can make it even more difficult for people with Alzheimer’s or dementia to navigate their world.
“There seems to be a connection between dementia and difficulties distinguishing between colours.
“People with Alzheimer’s disease may especially have problems recognising colours in the blue-violet range.”
There’s no certain way to prevent dementia from developing, but there are ways to lower your risk, said the NHS.
Eating a healthy, balanced diet should help to lower your chances of developing dementia.
It’s also important to do enough exercise. Everyone should aim to do at least 150 minutes of moderate-intensity activity every week.
There are around 850,000 people in the UK with dementia, and the condition affects one in every six people over 80 years old.