6. Vision Problems
Since AD patients are usually elderly, their sight might be going naturally in any case. However, a non-AD patient should still be able to judge the distance of certain things or the passage of time. When AD strikes, however, this cognitive function is among the first to go.
The loss of this skill could be frustrating, time-consuming, and even quite dangerous. Someone with undiagnosed AD may be driving a car along a once-familiar route and forget where they have to turn or brake. This could cause them to get lost at best and result in an accident at worse. In this manner, they could put several lives in danger, including their own.
Other unfortunate symptoms of this visual-spatial weakness include an AD patient losing focus in reading, not being able to work out the words. They may not be able to discern one color from the other, which again leads to a lot of risks.