Dementia symptoms vary from person to person, but a problem with visuospatial skills – trouble perceiving objects in three dimensions – is an early warning sign of vascular dementia, reports the Alzheimer’s Society.
This means sufferers may have difficulty when trying to pick up objects or judge distances, even in familiar environments or small areas such as a bedroom.
The disease affects depth perception, making falls more likely as sufferers have trouble navigating stairs or getting into bathtubs or cars.
Reaching for objects, such as a cup of tea or a door handle, can become increasingly difficult, the Alzheimer’s Society notes.
Driving also becomes difficult, as tasks such as turning a corner or changing lanes become challenging as three dimensional objects are harder to comprehend.
Sufferers can also become less sensitive to contrasts, such as between an object and the background, or between black and white. They may also be less able to detect movement.
Other symptoms of vascular dementia include difficulties following a series of steps, such as cooking a meal, and problems with speech.
A person may also display slower speed of thought, and trouble concentrating for any length of time.
Vascular dementia affects around 150,000 people in the UK, making it the second most common type of dementia after Alzheimer’s disease.
It is caused by reduced blood supply to the brain, usually due to a series of strokes, which damage the brain and impair cognition.
Symptoms may develop suddenly or more gradually, such as with small vessel disease.
The four main types of dementia are Alzheimer’s disease, vascular dementia, dementia with Lewy bodies and frontotemporal dementia.
The most common form, Alzheimer’s, is estimated to affect 850,000 people in the UK.
As well as forgetfulness, early warning signs include anxiety, confusion and difficulty making decisions.
The word dementia describes a broad set of symptoms that can include memory loss and difficulties with thinking, problem-solving or language.
The Mayo Clinic outlines five steps you can take in an attempt to prevent dementia, including getting enough Vitamin D and quitting smoking.