Gosset Corneal Epithelium Overview
The corneal epithelium is the outermost layer of the cornea, composed of several layers of non-keratinized, stratified squamous epithelial cells. It plays a critical role in maintaining ocular surface health, providing a barrier against pathogens and injury, and stabilizing the tear film essential for clear vision. The epithelium consists of basal cells, wing cells, and superficial squamous cells. Surface epithelial cells possess microvilli and microplicae that increase surface area to help stabilize the overlying tear film. Tight junctions between superficial epithelial cells maintain barrier function. Epithelial turnover occurs every 7–10 days via basal cell proliferation and centripetal migration from limbal stem cell populations. The glycocalyx on superficial epithelial cells helps anchor tears to the ocular surface. When injured or stressed, growth factors present in tears become upregulated to stimulate repair processes.
Mechanism of Action
Biological Functions
Disease Associations
Safety Considerations
- Infection
- Inflammation
- Scarring
- Neovascularization
- Persistent epithelial defects
- Drug-induced toxicity
Interacting Drugs
Associated Biomarkers
| Biomarker |
|---|
| Keratin K3/K12 expression |
| Epithelial thickness |
| Cell density |
| Wound healing rate |
| Tear film osmolarity |
| Inflammatory markers (e.g., MMP-9) |