It is estimated that visual field loss occurs in 46% of patients with acquired brain damage, (1) with homonymous hemianopia
(measured with perimetry) present in 54% of all patients with stroke-related vision loss.
The visual field test showed a homonymous hemianopia
on the left.
% Absent 134 67 Right Hemiplegia 8 4 Left Hemiplegia 30 15 Monoplegia- Right 10 5 Monoplegia-Left 8 4 Homonymous hemianopia
4 2 Cranial nerve palsy 6 3 Total 200 100 Table 6.
That night, after the coach once dubbed the "Inspector Gadget of Track and Field" charted his athletes' results from practice, he went to the emergency room with severe vision issues the Stroke Foundation would describe as homonymous hemianopia
-- "the loss of one half of the visual field in each eye."
A female patient had sensory paralysis that involved the right half of the body, a motor deficit consisting of permanent contracture in flexion of fingers 2-5 of the right hand, homonymous hemianopia
and amblyopia, depression and a history of gynecological disorders (5).
The exam was performed by the emergency medicine physician: patient exhibited normal ocular motions, sclera, and periorbital structures but exhibited bilateral homonymous hemianopia
. No signs of acute trauma were noted.
General physical examination was normal and neurological examination revealed right homonymous hemianopia
. All laboratory blood tests were unremarkable.
Prevalence rates for peripheral visual field loss (such as homonymous hemianopia
) vary from 14% to 20% (Brahm, Wilgenburg, Kirby, Ingalla, Chang & Goodrich, 2007), while visual neglect has a prevalence rate of 43% (Ringman, 2004).
She had onset of a homonymous hemianopia
and limb rigidity and then became bedbound and mute, dying 7 months after the onset of symptoms.
Optic tract syndrome (OTS) is caused by a unilateral optic tract lesion, which leads to homonymous hemianopia
, relative afferent pupillary defect (RAPD) in the contralateral eyes, and characteristic hemianopic optic atrophy in both eyes [1-3].
With the placement of a Fresnel prism, the patient with a left or right homonymous hemianopia
learns to scan into it, then to turn his or her head towards the periphery to view through the conventional lens to confirm the exact location of the displaced object.
Ninety percent of the patients had various clinical improvements, including improvements in visual acuity, homonymous hemianopia
, and spinal-cord related manifestations.