Related Experiment Video
Updated: Aug 5, 2026

12:23
Dynamic Visual Tests to Identify and Quantify Visual Damage and Repair Following Demyelination in Optic Neuritis Patients
Published on: April 14, 2014
The optic pathway in neurosarcoidosis
Annals of the New York Academy of Sciences
|January 1, 1976
Summary
A 40-year-old patient experienced progressive hypothalamic and visual failure due to widespread sarcoidosis affecting the central nervous system. Autopsy confirmed sarcoid granulomas infiltrating the optic pathway, highlighting independent and variable involvement patterns.
Area of Science:
- Neurology
- Ophthalmology
- Immunology
Background:
- Sarcoidosis is a multisystem inflammatory disease.
- Central nervous system (CNS) involvement in sarcoidosis can lead to diverse neurological deficits.
Observation:
- A 40-year-old patient presented with progressive hypothalamic and visual failure.
- Autopsy revealed widespread multisystemic sarcoidosis with significant CNS infiltration.
Findings:
- Diffuse infiltration of the intracranial optic pathway by sarcoid granulomas was observed.
- Optic nerve involvement in sarcoidosis can be independent across intraocular, intraorbital, and intracranial segments.
- Lesions affecting the optic nerve head and retrobulbar portions may be unilateral, while intracranial involvement is typically bilateral.
Implications:
- This case underscores the varied presentation of sarcoidosis affecting the visual system and CNS.
- Understanding these patterns is crucial for accurate diagnosis and management of neurosarcoidosis.
- Further research into the specific mechanisms of optic pathway infiltration in sarcoidosis is warranted.
Related Concept Videos
Vision
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.
Anatomy of the Eyeball
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...

