Ultrastructural and morphometric study of corticosteroid glaucoma in rabbits

Area of Science:

• Ophthalmology
• Cell Biology
• Pathology

Background:

• Glaucoma is a leading cause of irreversible blindness.
• Steroid-induced ocular hypertension is a known risk factor for glaucoma development.
• The corneo-scleral trabeculum plays a crucial role in aqueous humor outflow and intraocular pressure regulation.

Purpose of the Study:

• To investigate the ultrastructural changes in the corneo-scleral trabeculum of eyes with steroid-induced glaucoma.
• To evaluate the effect of steroids on endothelial cell activity and extracellular matrix components.
• To perform morphometric analysis of cytoplasmic organelles in response to steroid treatment.

Main Methods:

• Ultrastructural examination of the corneo-scleral trabeculum.
• Assessment of endothelial cell activity and ground substance characteristics.
• Hyaluronidase sensitivity testing of the ground substance.
• Morphometric analysis of cytoplasmic organelles.

Main Results:

• Increased endothelial activity was observed in steroid-induced glaucoma.
• Significant increase in ground substance and cytoplasmic organelles noted.
• Ground substance demonstrated high sensitivity to hyaluronidase.
• Morphometric analysis revealed significant differences in cytoplasmic organelles between treated and non-treated eyes.

Conclusions:

• Steroid administration induces significant ultrastructural alterations in the corneo-scleral trabeculum.
• These changes may contribute to the pathogenesis of steroid-induced glaucoma by affecting aqueous humor outflow.
• Further research is warranted to elucidate the precise mechanisms involved.