The researchers discovered that in Alzheimer's patients, the tiny blood vessels in the retina change in appearance. They also demonstrated that they can tell the difference between those with Alzheimer's disease and those with mild cognitive impairment.
A form of facial blindness, similar to prosopagnosia, is also known as facial agnosia. This is not necessary caused by cognitive loss of the dementia-related disease, but more by the damage that the disease has caused to the brain.
Blurred vision. Slower adjustment to light. Reduced peripheral vision. A decline in the ability to process distance and three-dimensional objects.
When someone has dementia, their field of vision narrows to about 12 inches around. As Teepa says, it's like wearing binoculars (33 sec in video). If you were to use binoculars and try to move around normally, it would be very difficult.
Depression, nutritional deficiencies, side-effects from medications and emotional distress can all produce symptoms that can be mistaken as early signs of dementia, such as communication and memory difficulties and behavioural changes.
1 Previously clean and tidy individuals may begin to look unkempt. Problems with poor toileting habits, bathing, and incontinence cause staining and odors. Appearance, previously important, gradually loses meaning.
The average life expectancy figures for the most common types of dementia are as follows: Alzheimer's disease – around eight to 10 years. Life expectancy is less if the person is diagnosed in their 80s or 90s. A few people with Alzheimer's live for longer, sometimes for 15 or even 20 years.
Memory problems
Difficulties with memory are the most well-known first signs of dementia. For example, a person may not recall recent events or may keep losing items (such as keys and glasses) around the house. Memory loss is often the first and main symptom in early Alzheimer's disease.
Memory loss that disrupts daily life: forgetting events, repeating yourself or relying on more aids to help you remember (like sticky notes or reminders). 2. Challenges in planning or solving problems: having trouble paying bills or cooking recipes you have used for years.
In late or severe dementia, the affected individual loses muscle control, the ability to swallow and cannot walk or sit without support. The capability to smile often disappears.
Trouble understanding visual images and spatial relationships. For some people, having vision problems is a sign of Alzheimer's. This may lead to difficulty with balance or trouble reading. They may also have problems judging distance and determining color or contrast, causing issues with driving.
Stage 6. In stage 6 of dementia, a person may start forgetting the names of close loved ones and have little memory of recent events. Communication is severely disabled and delusions, compulsions, anxiety, and agitation may occur.
Sleeping more and more is a common feature of later-stage dementia. As the disease progresses, the damage to a person's brain becomes more extensive and they gradually become weaker and frailer over time.
Fourth-stage. In the fourth stage, people with dementia may completely shut out the outside world. They might sit in a chair or lie in bed staring straight into thin air, or they might have their eyes closed. They may not respond when someone walks into the room or speaks to them.
increasing confusion or poor judgment. greater memory loss, including a loss of events in the more distant past. needing assistance with tasks, such as getting dressed, bathing, and grooming. significant personality and behavior changes, often caused by agitation and unfounded suspicion.
One of the most common causes of death for people with dementia is pneumonia caused by an infection. A person in the later stages of dementia may have symptoms that suggest that they are close to death, but can sometimes live with these symptoms for many months.
Many people affected by dementia are concerned that they may inherit or pass on dementia. The majority of dementia is not inherited by children and grandchildren. In rarer types of dementia there may be a strong genetic link, but these are only a tiny proportion of overall cases of dementia.
Mobility. Dementia is likely to have a big physical impact on the person in the later stages of the condition. They may gradually lose their ability to walk, stand or get themselves up from the chair or bed. They may also be more likely to fall.
People living with dementia keep their essence and spirit, although many will experience major personality changes. A sweet, gentle person may behave sweeter after the on-set of Alzheimer's, while the “bossy” kind may become even more controlling.
Individuals with dementia may experience memory difficulties, issues with their ability to think, and trouble completing daily tasks. They may be aware of their symptoms in the early stages of dementia. However, a person may lose this awareness by the late stages of dementia.
There is no one test to determine if someone has dementia. Doctors diagnose Alzheimer's and other types of dementia based on a careful medical history, a physical examination, laboratory tests, and the characteristic changes in thinking, day-to-day function and behavior associated with each type.
Apathy, or listlessness, is a common sign in early dementia. A person with dementia may lose interest in hobbies or activities that they used to enjoy doing. They may not want to go out anymore or have fun. They may also lose interest in spending time with friends and family, and they may seem emotionally flat.
The greatest known risk factor for Alzheimer's and other dementias is increasing age, but these disorders are not a normal part of aging. While age increases risk, it is not a direct cause of Alzheimer's. Most individuals with the disease are 65 and older. After age 65, the risk of Alzheimer's doubles every five years.