Normal and Abnormal Visual Pathways and the Cortical Representation of the Visual Field

1976 ◽  
pp. 7-21 ◽  
Author(s):  
R. W. Guillery
Keyword(s):  
Visual Field ◽  
Visual Pathways ◽  
Cortical Representation ◽  
Abnormal Visual

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)

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.

Abnormal visual pathways in human albinos studied with visually evoked potentials

1979 ◽  
Vol 65 (3) ◽  
pp. 667-679 ◽  
Author(s):  
J. Coleman ◽  
C.F. Sydnor ◽  
M.L. Wolbarsht ◽  
M. Bessler
Keyword(s):  
Evoked Potentials ◽  
Visual Pathways ◽  
Visually Evoked Potentials ◽  
Abnormal Visual

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 Layer-dependent loss and enhancement of geniculostriate and retinotectal pathways in adult human amblyopia

2020 ◽  
Author(s):  
Wen Wen ◽  
Yue Wang ◽  
Sheng He ◽  
Hong Liu ◽  
Chen Zhao ◽  
...  
Keyword(s):  
Critical Period ◽  
Developmental Plasticity ◽  
Visual Experience ◽  
Selective Reduction ◽  
Visual Pathways ◽  
Adult Human ◽  
Primate Visual Cortex ◽  
Abnormal Visual ◽  
Subcortical Visual Pathways ◽  
Shed Light

Abnormal visual experience during critical period leads to reorganization of neuroarchitectures in primate visual cortex. However, developmental plasticity of human subcortical visual pathways remains elusive. Using high-resolution fMRI and pathway-selective visual stimuli, we investigated layer-dependent response properties and connectivity of subcortical visual pathways of adult human amblyopia. Stimuli presented to the amblyopic eye showed selective response loss in the parvocellular layers of the lateral geniculate nucleus, and also reduced the connectivity to V1. Amblyopic eye's response to isoluminant chromatic stimulus was significantly reduced in the superficial layers of the superior colliculus, while the fellow eye's response robustly increased in the deeper layers associated with increased cortical feedbacks. Therefore, amblyopia led to selective reduction of parvocellular feedforward signals in the geniculostriate pathway, whereas loss and enhancement of parvocellular feedback signals in the retinotectal pathway. These findings shed light for future development of new tools for treating amblyopia and tracking the prognosis.

scholarly journals Examination of the intracranial disease patient in aware of visual loss and aware of abnormal visual field

2005 ◽  
Vol 34 ◽  
pp. 157-163
Author(s):  
Madoka Horibe ◽  
Kazuo Mukuno ◽  
Hiroe Matsuzaki ◽  
Tomoya Handa ◽  
Shuko Matsubayashi ◽  
...  
Keyword(s):  
Visual Field ◽  
Visual Loss ◽  
Disease Patient ◽  
Intracranial Disease ◽  
Abnormal Visual

Mutants with Abnormal Visual Pathways: An Explanation of Anomalous Geniculate Laminae

Science ◽  
1971 ◽  
Vol 174 (4011) ◽  
pp. 831-832 ◽  
Author(s):  
R. W. Guillery ◽  
C. S. Amorn ◽  
B. B. Eighmy
Keyword(s):  
Visual Pathways ◽  
Abnormal Visual
Sign in / Sign up

Export Citation Format

Share Document