NettetUnequal visual field defects in left and right eyes have also been described in the literature. 5 – 8 Not only is inter-eye asymmetry present between left and right eyes, but intra-eye or upper-lower asymmetry may also be present. NettetThe diagram on the left illustrates the basic organization of the primary visual pathway and indicates the location of various lesions. The right panels illustrate the visual field deficits associated with each lesion. …
Variable structure and function relationship of compressive optic ...
Nettet1. feb. 2002 · A unilateral temporal hemifield defect, as seen here, suggests a prechiasmal lesion, situated at the point where the optic nerve joins the chiasm (the … NettetA hemianopia (hemianopsia or homonymous hemianopia) is a visual field defect that occupies both the upper and the lower visual portions of the same hemifield of both eyes. With foveal splitting, the entire foveal representation is lost; with foveal sparing, these few degrees of vision near fixation are preserved. harold lueck obit in mn
Perimetry and visual field defects - ScienceDirect
Nettet2. jul. 2024 · Electrophysiological investigations: Left side: A) Visual evoked potentials (VEPs). Right side: B) Electroretinogram (ERG). Both tests revealed normal responses and could not explain the persistent binasal field defects. VEP = visual evoked potentials. NettetIt is an obstruction of retinal blood flow that may be due to an embolus causing occlusion or thrombus formation, vasculitis causing retinal vasculature inflammation, traumatic vessel wall damage, or spasm. The lack of oxygen delivery to the retina during the blockage often results in severe vision loss in the area of ischemic retina. Nettethemifield One half of the visual field, usually divided vertically through the fovea into the left or the right visual field. It occurs following transection of the optic chiasma. Hemifield neglect sometimes occurs following trauma to the posterior lobe of … harold lowry md