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.

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 ?
At the age of 33, the arteriovenous malformation was surgically removed, resulting in a dense left homonymous hemianopia.
Of the eight patients with OTS, six had incomplete homonymous hemianopia and two had complete homonymous hemianopia.
Patients with hemiparesis, homonymous hemianopia and new disorders of higher cerebral dysfunction e.g.
Neurologic deficit was localized to the left side and revealed a homonymous hemianopia, facial weakness, deviation of the tongue to the left, flaccid hemiparesis, hypoesthesis to pinprick sensation, hyperreflexia, and Babinski sign.
02 OxSight Prism glasses are designed to help people with peripheral vision loss such as glaucoma, retinitis pigmentosa and homonymous hemianopia.
In the present study, among the non-epileptic manifestations, headache with or without vomiting (10, 19.23%) was the most common presentation followed by hemiparesis 8 (15.38%), either of right or left, homonymous hemianopia 6 (11.54%), and hemichorea 6 (11.54%) in cases of single ring enhancing computed tomography lesion [Table-3].
Neurologic examination showed left homonymous hemianopia, increased deep tendon reflexes in the left hemibody, and the Babinski sign on the left hallux.
Our neurological evaluation revealed dysarthria, right side paresthesias, and left limbs ataxia in addition to right lateral homonymous hemianopia that was secondary to the previous ischemic event.
Physical examination revealed right homonymous hemianopia, without other neurological positive signs.
This study aimed to determine whether it is possible to predict driving safety of individuals with homonymous hemianopia or quadrantanopia based upon a clinical review of neuroimages that are routinely available in clinical practice.
Retrochiasmal optic tract pathology results in contralateral homonymous hemianopia. Hemianopia due to the lesion in anterior optic tract is characteristically non congruous, while that due to pathology in posterior optic radiations and occipital cortex are highly congruous1.
So while homonymous hemianopia, hemianesthesia, hemiparesis, or other sensory and motor impairments may occur with UN, they do not cause UN and can be doubly disassociated from it.