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Published on: June 19, 2012
by The Alzheimer’s Association:
Vision problems are a concern because more than sixty percent of individuals with Alzheimer’s will have a decline in some sort of visual capacity. Problems most often arise in four areas: motion blindness, depth perception, color perception, and contrast sensitivity.
Some people with Alzheimer’s are affected by motion blindness and are unable to sense movement. For these people they view the world as a series of still frames, rather than a “movie” that most people see. Doctors have theorized that this view of the world causes affected persons to become lost, even in familiar surroundings.
Persons with Alzheimer’s may also lose depth perception. Three-dimensional objects may begin to appear flat. This lack of perception could make shadows or a dark rug look like holes.
Many people will experience their color perception diminish as they age. However, persons with Alzheimer’s seem to experience a greater deficit of color perception, especially with colors in the blue-violet range.
The ability to see contrast between colors, not just the color itself, also is reduced in persons with Alzheimer’s. For example, if a bathroom has the same color toilet as the floor and walls, the person may have difficulty finding the toilet.
Tips for caregivers to help the individual with Alzheimer’s:
Source: Massachusetts Chapter newsletter
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