Conjunctiva in asymptomatic contact lens wearers

Area of Science:

• Ophthalmology
• Cell Biology
• Biomaterials Science

Background:

• Contact lens wear is common, but its long-term effects on ocular surface tissues are not fully understood.
• Previous research has focused on symptomatic conditions like giant papillary conjunctivitis.

Purpose of the Study:

• To investigate the ultrastructural changes in the upper tarsal conjunctiva of asymptomatic contact lens wearers.
• To compare these changes between hard and soft contact lens wearers.

Main Methods:

• Scanning electron microscopy (SEM) was used to examine biopsy specimens.
• Eleven asymptomatic contact lens wearers (5 hard, 6 soft) were included.

Main Results:

• Asymptomatic contact lens wearers exhibited altered conjunctival epithelial cell surfaces.
• Characterized by centralized microvilli and peripheral plasma membrane baring.
• These alterations were observed in all subjects, regardless of lens type, and differed from normal conjunctiva and that seen in giant papillary conjunctivitis.

Conclusions:

• The upper tarsal conjunctiva undergoes significant epithelial surface alterations in asymptomatic contact lens wearers.
• These changes suggest an adaptive or reactive response to contact lens wear.
• Further research is needed to understand the clinical implications of these subclinical changes.