Homonymous hemianopsia

Homonymous hemianopia (HH) is a visual field defect involving either two right or the two left halves of the visual field of

both eye. It results from the damage of the visual pathway in its suprachiasmatic part. The causes of HH include stroke, brain

tumors, head injuries, neurosurgical procedures, multiple sclerosis and miscellaneous conditions. HH result in a severe visual

impairment and affect a variety of cognitive visual functions. Patients with HH frequently have difficulties with reading and

scanning scenes in sufficiently rapid fashion to make sense of things as a whole. They stumble, fall or knock objects in their

surroundings, since they cannot see them and they are frequent surprised that somebody or something suddenly appeared in

their visual field. The prognosis of visual field deficit recovery is highly variable and depends on the cause and severity of brain

and optic pathway injury. The fundamental method in the management of HH patients is rehabilitation. Rehabilitation techniques used in HH include three groups of methods: optical therapies, eye movement-based therapies, and visual field restitution

therapies.