homonymous visual field defectoccipital strokeoptical coherence tomographyretinal nerve fiber layerIntroduction Stroke is the most common cause of homonymous visual field defects (VFD). About half of the stroke patients recover from VFD. However, relationship between VFD and retinal changes remains ...
For example, a right homonymous hemianopia affects the right visual space of both eyes (i.e., the temporal field of the right eye and the nasal field of the left eye). Homonymous implies that the defect does not cross the vertical meridian. III. THE ANATOMY OF THE VISUAL PATHWAYS...
Background: Homonymous visual field defects (VFD) are common following stroke, and often recover, partially or fully, by unknown mechanisms. In clinical practice, visual field recovered on perimetry is often considered perceptually normal. However, studies have shown contrast sensitivity (CS) deficit...
A lesion of this nucleus produces moderately to completely congruent visual field defects. Five patients with ischaemic lesions of the lateral geniculate body are reported. Two patients had a wedge-shaped homonymous hemianopia, two other cases had congruent superior homonymous quadratic defects and ...
Homonymous hemianopia (HH) is one kind of visual field defect that the right or left half of the visual fields of both eyes are missing. HH is caused by damage to the neural pathways of the brain and a complete recovery is usually difficult. This study proposes a new information compensa...
visual field- all of the points of the physical environment that can be perceived by a stable eye at a given moment field of regard,field of vision visual percept,visual image- a percept that arises from the eyes; an image in the visual system ...
Simple formed hallucinations confined to the area of a specific visual field defect. Thirteen patients with transient or permanent homonymous experienced formed localized to the affected part of the visual field. The lesion was occipital in... LANCE JAMES W. - 《Brain A Journal of Neurology》 被...
Postchiasmatic– these are same-sided field defects, termed homonymous hemianopias. Those that are incomplete and asymmetrical are termed incongruous. The more posterior the lesion, the more congruous the defect becomes. Quadrantanopia– when the optic radiations going through the temporal (Meyer’...
A quantitative point-by-point analysis was made in the affected superior quadrant, and the defects were averaged for the whole patient group.Thirty-one patients developed a visual field defect, but none was aware of the defect. The points nearest fixation were relatively spared. The defects were...
training during a six-month period. To evaluate the treatment effect, the size of the VF defect before and after treatment was quantified with the help of a scanning laser ophthalmoscope. In none of the patients, however, an explicit homonymous change of the absolute field defect border was ...