Related Experiment Video
Updated: Aug 15, 2026
10:05
DTI of the Visual Pathway - White Matter Tracts and Cerebral Lesions
Published on: August 26, 2014
[Neuroradiological examination of the intracranial visual pathway. Part I]
1Institut für Neuroradiologie, Universitätsklinikum, Mainz. mueller-forell@neuroradio.klinik.uni-mainz.de
Der Radiologe
|September 27, 2005
Abstract:
The clinical symptoms of lesions affecting the intracranial visual pathway vary as widely as their aetiology. The anatomy, the basics of neuro-ophthalmology and MRI protocols are touched on in the first part of this serial paper; in addition the most important pathological entities affecting the sellar region are presented. The focus is on the differentiation between extrinsic and intrinsic lesions, but in addition to this vascular lesions are presented with reference to illustrative cases.
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01:24Vision
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
01:26Visual System
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Once through the pupil, the light passes through the lens, a...