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 ?
deficits and with mass effect abnormalities; Dx: MS BAEP = Brain stem auditory evoked potential, CC = corpus callosum, CSF = cerebrospinal fluid, CT = computed tomography, DX = diagnosis, enhanc = enhancing or enhancement, ext = extension; HA = headaches, gen = generalized, HH = homonymous hemianopia, INO = internuclear opthalmoplegia, MRI = magnetic resonance imaging, MS = multiple sclerosis, NI = normal image, OD = right eye, ON = optic neuritis, SSEP = somatosensory evoked potentials, Sx = symptoms of multiple sclerosis, VEP = visual evoked potential.
Homonymous hemianopia (HH) is a frequent visual consequence in patients suffering from stroke as a result of postchiasmal damage.
Visual field defects particularly homonymous hemianopia, are common following stroke including our own data.
Peripheral 60 - 4 threshold visual field (VF) analysis was done on Humphrey(r) Field Analyzer (720-i series), which revealed right dense, congruous homonymous hemianopia (Fig 3).
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.
No motor deficiency was observed, but there was left homonymous hemianopia.
Post chiasmal visual pathway: Post chiasmal interference in visual pathway produces homonymous hemianopia in visual field from a single lesion.
Optometric findings for Craig at admission were a reduced visual acuity (20/80 in the right eye and 20/400 in the left eye) with homonymous hemianopia, as well as a binocular vision disorder.
No extraocular palsies were noted, but he had decreased visual fields with bitemporal homonymous hemianopia.
Homonymous hemianopia [67, 68, 85] and conjugate deviation of the eyes [68] are possible negative predictors for disability.
VA of better than 6/60 with a very constricted visual field, especially in the lower part of the field (excluding people who suffer from homonymous hemianopia or bi-temporal hemianopia with VA better than 6/18).
Homonymous hemianopia and unilateral visual neglect are common vision problems following stroke.