Hemianopsia


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Related to Hemianopsia: binasal hemianopsia

hemianopsia

[‚he·mē·ə′näp·sē·ə]
(medicine)
Bilateral or unilateral blindness in one-half of the field of vision.

Hemianopsia

 

loss of half of the field of vision; half blindness.

Hemianopsia is described as either multilateral, which is characterized by loss of either the outer or the inner halves of the field of vision, or unilateral (homonymous), in which the same halves of the field of vision (whether right or left) are lost. Hemianopsia occurs with cerebal hemorrhage, cranial injuries, or brain tumors. If the brain tissue is not entirely destroyed, hemianopsia is reversible. The lost field of vision is usually blind to all types of visual sensations, although sometimes perception of the shape of an object, for example, is lost, while perception of color, light, and movement in the same field of vision is preserved. Treatment involves elimination of the primary cause of the hemianopsia.

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The stroke team found the patient awake and alert but with a decreased gag reflex, dysarthric with acute left hemiparesis with no sensation in the left upper or lower extremities, and a left homonymous hemianopsia field cut.
Both right and left homonymous hemianopsias are common and can significantly interfere with reading and mobility (Kerkhoff, 2000).
Evaluation of the visual fields showed left homonymous hemianopsia.
She had a preferential left gaze, right facial droop, and right homonymous hemianopsia.
A 42-year-old man presented with bitemporal hemianopsia and decreased visual acuity.
Five volunteers then joined the speaker on the stage to don glasses that simulated common eye diseases of the elderly: macular degeneration, glaucoma, cataracts, hemianopsia (blindness in part of the field of vision, common after a stroke), as well as yellowing of the lenses.
Alexia without agraphia, hemianopsia, or color-naming deficit: A disconnection syndrome.
On neuropsychological evaluation his greatest cognitive deficits were those attributed to his right hemisphere lesion: a left homonomous hemianopsia, left neglect, visual scanning deficits, and visual/perceptual deficits.
Neurological examination revealed no neck stiffness or Kernig's sign, while left homonym hemianopsia, left central facial paralysis, left hemiplegia and hemi hypoesthesia were detected.
Secondly, Neuronal Regeneration Research published a paper suggesting that NeuroAiD may increase the recovery of vision deficits in post stroke Homonymous Hemianopsia patients.
Difficulties responding to a visual stimuli may not reflect a motor problem, such as in someone with hemianopsia.