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Retrocorneal fibrous membrane in the vitreous touch syndrome
Abstract:
The retrocorneal fibrous membrane in eight cases of the vitreous touch syndrome was characterized by homogeneous granular material, fine filaments arranged either singly or in bundles, multiple lamellae of basement membrane-like material, and banded figures of similar to 110 nm periodicity. Seven cases demonstrated an intact endothelial monolayer while only one showed cells in a markedly thickened fibrous layer. These findings support the pathogenic mechanism of endothelial fibrous metaplasia and secretory activity as the origin of the retrocorneal fibrous membrane in the vitreous touch syndrome.
Insights
The retrocorneal fibrous membrane in vitreous touch syndrome originates from endothelial fibrous metaplasia. This membrane contains granular material, filaments, and basement membrane-like structures.
Area of Science:
- Ophthalmology
- Cell Biology
Background:
- Vitreous touch syndrome is an ocular condition.
- The retrocorneal fibrous membrane's origin is not fully understood.
Purpose of the Study:
- To characterize the ultrastructure of the retrocorneal fibrous membrane in vitreous touch syndrome.
- To elucidate the pathogenic mechanism behind its formation.
Main Methods:
- Electron microscopy was used to examine the retrocorneal fibrous membrane in eight patients.
- Histopathological analysis of the membrane's composition and cellularity.
Main Results:
- The membrane comprised homogeneous granular material, fine filaments, and lamellae of basement membrane-like material.
- A periodicity of approximately 110 nm was observed in some structures.
- Seven of eight cases showed an intact endothelial monolayer; one had cells within a thickened fibrous layer.
Conclusions:
- Findings support endothelial fibrous metaplasia and secretory activity as the origin of the retrocorneal fibrous membrane.
- This study clarifies the pathogenesis of this membrane in vitreous touch syndrome.