Visual pathway lesions - Wikipedia
Lesions in that pathway cause a variety of visual field defects. In the visual system of human eye, the visual information processed by retinal photoreceptor cells travel in the following way: The type of field defect can help localize where the lesion is located (see picture given in infobox).
Visual Pathway and Visual Field Defects - Geeky Medics
Nov 29, 2020 · Visual field defects. At the optic chiasm, fibres from the nasal half of the retina, corresponding to the temporal visual field, decussate. Lesions compressing the chiasm, such as pituitary adenomas, therefore cause bitemporal hemianopia. Lesions to optic radiations result in homonymous contralateral quadrantanopia.
Visual Field Defects. 39. What’s the difference between a . depression. and a . scotoma? A . depression. is an inward shifting of the outer limit of the visual field, whereas a . scotoma. is an area of field loss surrounded on all sides by areas of normal sensitivity.
Visual Pathway Lesions and Corresponding Visual Field Defects …
Sep 14, 2022 · Visual pathway defects can occur due to various causes, such as compression of the optic nerve via a tumor, aneurysm, ischemic optic neuropathy, and many more.1 When a patient is affected by a pathway lesion, they may lose vision in a certain visual field area, which can be detected during an eye exam or visual field test.
Decoding Visual Pathway Lesions - American Academy of Ophthalmology
Sep 1, 2023 · Conceptualizing the visual pathway in three major sections—optic nerve, chiasm, and retrochiasm—can be helpful in identifying patterns of disease and localization because pathology will vary based on which section of the visual pathway is affected. The finds are described assuming a left-sided lesion.
Visual Field Deficits - Neuroscience - NCBI Bookshelf
The 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. (A) Loss of vision in right eye. (B) Bitemporal (heteronomous) hemianopsia. (C) Left homonymous hemianopsia.
Visual fields in neuro-ophthalmology - PMC - PubMed Central …
Visual field assessment is important in the evaluation of lesions involving the visual pathways and should be performed at baseline and periodically in the follow-up. Standard automated perimetry has been shown to be adequate in neuro-ophthalmic practise and is now the technique of choice for a majority of practitioners.
Visual Field Defect Patterns Associated With Lesions of the ... - LWW
In correlating discrete MRI-defined retrochiasmal lesions with visual field defect patterns identified on static perimetry, this study showed that macular sparing, homonymous paracentral scotomas, and quadrantanopias localized to the visual cortex …
Visual Fields - Clinical Methods - NCBI Bookshelf
There is a great variety in both the methods and apparatus used for evaluating fields of vision. Quantified visual field testing with either a Goldmann perimeter or a tangent screen is ideal but may be impractical or impossible in a great many situations.
Visual Pathway & Visual Field Defects | Lecturio Medical
May 17, 2024 · Learn the steps of the visual pathway of the eye from the retina to the brain, and the visual field defects that can result from lesions along the pathway