Morphological changes in the human conjunctival epithelium. II. In keratoconjunctivitis sicca

Area of Science:

• Ophthalmology
• Pathology
• Cell Biology

Background:

• Keratoconjunctivitis sicca (KCS), or dry eye disease, affects ocular surface health.
• Understanding the cellular changes in KCS is crucial for developing effective treatments.

Purpose of the Study:

• To correlate clinicopathological findings in conjunctival biopsies with the severity of keratoconjunctivitis sicca.
• To investigate the relationship between epithelial changes, goblet cell density, and clinical manifestations of KCS.

Main Methods:

• Light and transmission electron microscopy of conjunctival biopsies from 24 KCS patients.
• Quantitative analysis of epithelial stratification and goblet cell counts.
• Correlation of histological findings with clinical disease severity and surgical interventions.

Main Results:

• Epithelial stratification and superficial cell layer separation were directly proportional to KCS severity.
• Goblet cell counts were inversely proportional to epithelial stratification and significantly reduced compared to normal tissue.
• Reduced stratification and increased goblet cells correlated with nasolacrimal duct occlusion in severe KCS cases.
• Conjunctival microplicae were reduced and deformed, potentially impacting tear film stability.

Conclusions:

• Conjunctival epithelial changes, including stratification and goblet cell loss, are key pathological features of KCS.
• These histological alterations are closely linked to disease severity and may influence tear film dynamics.
• Nasolacrimal duct occlusion in severe KCS is associated with specific epithelial and goblet cell changes.