homonymous hemianopia


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hemianopia

 [hem″e-ah-no´pe-ah]
defective vision or blindness in half of the visual field; usually applied to bilateral defects caused by a single lesion. adj., adj hemianop´ic, hemianop´tic.
Patient Care. Visual field deficit on one side often occurs as a result of stroke syndrome. Patients with this problem are unable to perceive objects to the side of the visual midline. The visual loss is contralateral, i.e., it is on the side opposite the brain lesion. To facilitate self care, commonly used articles such as the water pitcher, meal tray, and call bell are placed on the unaffected side. The patient should be approached from and communicated with while standing or sitting on the side in which vision is best. When in visual contact with the patient, caregivers should move slowly toward and past the visual boundary to stimulate scanning to the affected side. Auditory and visual stimulation on the affected side can help improve and maintain residual sight on that side.
Visual field defects associated with hemianopia. From Polaski and Tatro, 1996.
homonymous hemianopia hemianopia affecting the right halves or the left halves of the visual fields of both eyes. The patient must turn the head from side to side to compensate for the defect. Often it is due not to any pathology in the eye itself but to damage to the optic tract or occipital lobe.

ho·mon·y·mous hem·i·a·nop·i·a

blindness in the corresponding (right or left) field of vision of each eye.

homonymous hemianopia

Etymology: Gk, homos + onyma, name
blindness or defective vision in the right or left halves of the visual fields of both eyes.

ho·mon·y·mous hem·i·a·no·pi·a

(hŏ-mon'ŏ-mŭs hem'ē-ă-nō'pē-ă)
Visual deficit affecting the same side (right or left) of each visual field.
Synonym(s): homonymous hemianopsia.

homonymous hemianopia

Loss of half of the field of vision of each eye, the loss being either of both right halves or both left halves.
References in periodicals archive ?
Congenital homonymous hemianopia and cortical migration abnormalities in a young adult.
Field expansion for homonymous hemianopia by optically induced peripheral exotropia.
Neurologic examination showed a dense left homonymous hemianopia.
Fresnel prisms improve visual perception in stroke patients with homonymous hemianopia or unilateral visual neglect.
The authors also conducted Estermann's VF assessment (Figure 1), which confirmed that she was not medically able to drive and also confirmed the original diagnosis of right homonymous hemianopia.
3) showed that confrontation testing had a high sensitivity (75% to 100%) for detecting altitudinal visual loss, central/ centrocecal scotoma and homonymous hemianopia.
An incongruous homonymous hemianopia, a congruous sectoral hemianopia that crosses the horizontal meridian and sparing of this sector but damage to the upper and lower sections.
A homonymous hemianopia that does not spare the fovea, causing 'Macular splitting' has less localising value.
No extraocular palsies were noted, but he had decreased visual fields with bitemporal homonymous hemianopia.
Saccadic visual search training: A treatment for patients with homonymous hemianopia.
This can include unilateral optic nerve lesions, paracentral scotomas, congruous and incongruous homonymous hemianopias and quadrantanopias, as well as altitudinal defects.