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Diabetic vitreopathy--findings using the celloidin embedding technique

J Faulborn1, S Dunker, S Bowald

  • 1University Eye Clinic, Graz, Austria.

Ophthalmologica. Journal International D'Ophtalmologie. International Journal of Ophthalmology. Zeitschrift Fur Augenheilkunde
|December 5, 1998
PubMed
Summary
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Diabetic eyes show significant vitreous changes, including aggregated collagen fibers and altered hyalocytes, differing from normal vitreous structure. These findings suggest potential nonenzymatic glycosylation contributing to diabetic vitreopathy.

Area of Science:

  • Ophthalmology
  • Diabetic Retinopathy Research
  • Vitreous Humor Studies

Background:

  • The vitreous humor's role in diabetic eye disease is under investigation.
  • Autopsy eyes from diabetic patients were examined using advanced microscopy techniques.

Purpose of the Study:

  • To evaluate the morphological changes in the vitreous of diabetic eyes.
  • To compare the vitreous structure in diabetic versus non-diabetic individuals.

Main Methods:

  • Light and electron microscopy (SEM, TEM) were used on autopsy eyes from 19 type II diabetic patients.
  • Glycerol-dehydrated globes were processed for celloidin and paraffin embedding for sectioning.
  • Detailed histological analysis of vitreous cortex, collagen fibers, and hyalocytes was performed.

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Main Results:

  • Diabetic vitreous exhibited delayed degeneration, intensified cortical staining, and incomplete posterior detachment.
  • Coarse, aggregated collagen fibers were observed in the central vitreous cortex.
  • Hyalocytes in diabetic eyes showed altered morphology and increased numbers compared to non-diabetic controls.

Conclusions:

  • The vitreous in diabetic patients presents distinct morphological differences from normal vitreous.
  • Key features include aggregated collagen, increased cortical density, and hyalocyte changes.
  • Nonenzymatic glycosylation of collagen is proposed as a potential cause of these diabetic vitreopathies.