Morphological changes in the human conjunctival epithelium. I. In the normal elderly population

Area of Science:

• Ophthalmology
• Cell Biology
• Gerontology

Background:

• The bulbar conjunctiva is a crucial ocular surface tissue.
• Age-related changes in ocular tissues are common but require detailed morphological study.

Purpose of the Study:

• To investigate age-related morphological alterations in the bulbar conjunctival epithelium.
• To characterize changes in goblet cell population and identify novel structures in older individuals.

Main Methods:

• Light and transmission electron microscopy were employed.
• Forty-nine bulbar conjunctiva biopsies were analyzed from individuals across different age groups.
• Histopathological examination focused on epithelial thickness, goblet cell morphology, and presence of specific inclusions.

Main Results:

• No significant morphological changes were observed in conjunctival biopsies from individuals under 79 years old.
• In individuals aged 79 and above, the epithelium displayed irregular thickness and a reduced goblet cell count.
• Hyaline bodies were present in 25% of the older age group specimens; epithelial stratification was mild and also seen in some younger individuals.
• Goblet cells appeared morphologically normal across all age groups.

Conclusions:

• The bulbar conjunctiva undergoes age-related morphological changes, particularly evident in individuals over 79 years old.
• Reduced goblet cell density and the appearance of hyaline bodies are characteristic findings in the aging conjunctiva.
• Further research is needed to elucidate the exact nature and clinical significance of these hyaline bodies in relation to goblet cells.