This is known as neglect, and individuals who experience this may forget to dress that side of the body or may continually bump into objects on that side. While it may appear that the person can not see to get around, he or she may actually be unaware that they must allow appropriate space for the neglected side of the body. Neglect most commonly occurs when a stroke has occurred in the right hemisphere of the brain. An individual's perception and awareness may also be affected by a stroke. He or she may be unable to understand speech, and may have problems with reading, writing, talking, or listening.
Agnosia can also result from a stroke.
A person with this condition may be able to clearly and correctly see an abject, but can not name it. It is easy to see how this could be mistaken for a visual deficit when in fact it is a cognitive deficit in perception. Surgery, drugs, hospitalization, and rehabilitation are all currently accepted forms of treatment for stroke patients. The sooner the patient receives treatment, the better his or her chances are for surviving and minimizing the damage. With regard to visual rehabilitation, people may receive many services, including low vision aides, rehabilitation teaching, and orientation and mobility training.