Abnormal visual field maps in human cortex: A mini-review and a case report

Cortex ◽  
2014 ◽  
Vol 56 ◽  
pp. 14-25 ◽  
Author(s):  
Koen V. Haak ◽  
Dave R.M. Langers ◽  
Remco Renken ◽  
Pim van Dijk ◽  
Johannes Borgstein ◽  
...  
Keyword(s):  
Case Report ◽  
Visual Field ◽  
Human Cortex ◽  
Visual Field Maps ◽  
Abnormal Visual

scholarly journals Visual field map clusters in human cortex

2005 ◽  
Vol 360 (1456) ◽  
pp. 693-707 ◽  
Author(s):  
Brian A Wandell ◽  
Alyssa A Brewer ◽  
Robert F Dougherty
Keyword(s):  
Visual Field ◽  
Functional Mri ◽  
Spatial Organization ◽  
Perceptual Processing ◽  
Large Set ◽  
Human Cortex ◽  
General Properties ◽  
Visual Field Maps

We describe the location and general properties of nine human visual field maps. The cortical location of each map, as well as many examples of the eccentricity and angular representations within these maps, are shown in a series of images that summarize a large set of functional MRI data. The organization and properties of these maps are compared and contrasted with descriptions by other investigators. We hypothesize that the human visual field maps are arranged in several clusters, each comprising a group of maps that share a common foveal representation and semicircular eccentricity map. The spatial organization of these clusters suggests that the perceptual processing within each cluster serves related functions.

Normal and abnormal visual field maps in albinos: Central effects of non-matching maps

1990 ◽  
Vol 11 (3) ◽  
pp. 177-183 ◽  
Author(s):  
R. W. Guillery
Keyword(s):  
Visual Field ◽  
Central Effects ◽  
Visual Field Maps ◽  
Abnormal Visual

scholarly journals Visual Field Maps in Human Cortex

Neuron ◽  
2007 ◽  
Vol 56 (2) ◽  
pp. 366-383 ◽  
Author(s):  
Brian A. Wandell ◽  
Serge O. Dumoulin ◽  
Alyssa A. Brewer
Keyword(s):  
Visual Field ◽  
Human Cortex ◽  
Visual Field Maps

Pediatric Visual Snow Syndrome (VSS): A Case Series

2019 ◽  
pp. 249-254
Author(s):  
Kenneth J. Ciuffreda ◽  
MH Esther Han ◽  
Barry Tannen
Keyword(s):  
Visual Field ◽  
Case Series ◽  
Therapeutic Interventions ◽  
Visual Condition ◽  
Visual Phenomena ◽  
Entire Visual Field ◽  
The Individual ◽  
Vision Therapy ◽  
Abnormal Visual

Visual snow syndrome (VSS) is a relatively rare, unusual, and disturbing abnormal visual condition. The individual perceives “visual snow” (VS) throughout the entire visual field, as well as other abnormal visual phenomena (e.g., photopsia). Only relatively recently has treatment been proposed (e.g., chromatic filters) in adults with VSS, but rarely in the pediatric VSS population (i.e., medications). In this paper, we present three well-documented cases of VSS in children, including their successful neuro-optometric therapeutic interventions (i.e., chromatic filters and saccadic-based vision therapy)

scholarly journals Tablets at the bedside - iPad-based visual field test used in the diagnosis of Intrasellar Haemangiopericytoma: a case report

2017 ◽  
Vol 17 (1) ◽  
Author(s):  
Nisha Nesaratnam ◽  
Peter B. M. Thomas ◽  
Ramez Kirollos ◽  
Algis J. Vingrys ◽  
George Y. X. Kong ◽  
...  
Keyword(s):  
Case Report ◽  
Visual Field ◽  
Field Test ◽  
Visual Field Test

scholarly journals Early Recognition of Stroke by Confrontation Visual Field Test – Is It Possible?

2020 ◽  
Keyword(s):  
Case Report ◽  
Visual Field ◽  
Cerebral Artery ◽  
Vision Loss ◽  
Posterior Cerebral Artery ◽  
Early Recognition ◽  
Past History ◽  
Neurological Deficits ◽  
Visual Field Defects ◽  
Axial Tomography

Introduction: Visual field loss is often the first sign of lesion of the anterior or posterior visual pathways. Screening for visual field defects should be a part of all routine eye examinations, mainly when neurological lesions are suspected. A confrontation visual field (CVF) test provide a rapid and practical method of visual field assessment, allowing the recognition of major neurological deficits. Materials and Research Methods: To report a case of posterior cerebral artery (PCA) stroke early suspected by CVF test. Case-Report: A 77 year-old male presented to our emergency department with vision blurring complaints and a strange sensation of a vision loss on one side on the left eye (OS), for the previous 15 days. He explained that symptoms initiated after an episode of dizziness followed by lipothymia. He denied diplopia or headaches. Past history revealed hypertension and diabetes as cardiovascular risk factors. The best corrected visual acuity was 20/25 on right eye (OD) and 20/60 on OS and pupillary reflexes were normal. CVF test was performed and showed a decrease on left hemicampus of OS. The biomicroscopy was normal and the fundus examination showed optic nerve edema bilaterally, also documented by Optical Coherence Tomography. Considering the findings and the history, neuroimaging and a neurological observation were requested. Computerized axial tomography revealed a hypodense lesion in right occipital posterior region, with hematic density. He was hospitalized for proper treatment with the diagnosis of posterior cerebral artery ischemic stroke, with further hemorrhagic transformation. Discussion: In acute stroke, visual disorders may form all or part of the initial presentation. Homonymous visual field deficits are well-known almost universal characteristics of PCA ischemia, however, due to the absent of cognitive impairment or speech problems associated to many cases, the diagnosis can be challenging at early stages. Our case-report highlights the importance of using CVF test to an immediate inspection of the peripheral visual field, in order to detect acute major defects, including homonymous deficits, to understand if a further prompt neurological examination is mandatory.

Neuro-ophthalmology: Disorders of Visual Perception, Pupils, and Eyelids

2021 ◽  
pp. 821-833
Author(s):  
Shivram Kumar ◽  
Kelly D. Flemming
Keyword(s):  
Visual Acuity ◽  
Visual Field ◽  
Visual Perception ◽  
Visual Loss ◽  
Visual Field Defects ◽  
Clinical Disorders ◽  
Physical Findings ◽  
Abnormal Visual ◽  
Visual Changes ◽  
Field Defects

Visual loss may develop acutely, subacutely, or insidiously. The course may be transient, static, or progressive. This chapter reviews the causes, diagnosis, and treatment of various disorders resulting in visual loss or abnormal visual perception. In addition, it reviews clinical disorders of the eyelids and pupils. Disorders of visual perception involve visual acuity, color perception, visual field defects, and other visual changes. Historical information and physical findings on examination can help to localize the problem and define the cause.

scholarly journals Ocular Perforation and Visual Field Defect Caused by an Acupuncture Needle: a Case Report

2013 ◽  
Vol 54 (9) ◽  
pp. 1475 ◽  
Author(s):  
Hyunseung Kang ◽  
Dong Kyu Lee ◽  
Su Jin Lim ◽  
Hyoung Eun Kim ◽  
Oh Woong Kwon
Keyword(s):  
Case Report ◽  
Visual Field ◽  
Visual Field Defect ◽  
Acupuncture Needle ◽  
Field Defect

scholarly journals Visual-Field Loss Caused by Sinusitis: A Case Report

2003 ◽  
Vol 82 (1) ◽  
pp. 42-45 ◽  
Author(s):  
Pieter Gouws
Keyword(s):  
Case Report ◽  
Visual Field ◽  
Visual Field Loss ◽  
Direct Compression ◽  
Surgical Drainage ◽  
Sinus Disease

The author reports a case of visual-field loss that was not characterized by any direct compression or external signs of sinus disease. The patient's hemianopia was found to be associated with severe sinusitis, which had not been clinically apparent and which had not extended beyond the bony walls of the sinuses. Following surgical drainage of the affected sinuses, the hemianopia resolved immediately and completely.

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