functional blindness

In those rare cases, the symptoms are often severe enough to result in functional blindness.

While functional blindness is a known psychological disorder, there has been virtually no documentation of the condition in specific population groups.

Symptoms can range from a simple increased frequency of blinking to constant, painful eye closure leading to functional blindness.

The condition causes a functional blindness to subtle non-verbal social-emotional cues in voice, gesture, and facial expression.

Doctors and specialists say that there is no physical explanation and that what they have is functional blindness, a vision loss caused by psychological factors.

For people, like my husband, who suffer from blepharospasm and related dystonia, the botulinum toxin can make the difference between functional blindness and sight.

Dr. Rosee-Koker said anecdotal evidence suggests a significant rate of functional blindness among survivors of the Holocaust and Vietnam War veterans.

Around 1988, while in retirement, Allen began to experience symptoms of macular degeneration, an incurable dysfunction that had resulted in functional blindness for millions of senior citizens.

These compounds also induce a profound dilatation of the pupils and suppress eye saccades, resulting in considerable degradation of visual acuity, often to the point of functional blindness.