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Eyelid Oil Mystery: Bacteria Link to Dry Eye Found
31 Oct
Summary
- MGD patients had more types of bacteria on eyes.
- Nearly all MGD bacteria could form harmful biofilms.
- Eyelid oil composition differs in dry eye patients.
Researchers in Hyderabad have uncovered significant changes in the bacteria and eyelid oil of individuals suffering from Meibomian Gland Dysfunction (MGD), a prevalent cause of dry eye. The study, published in the UK-based journal Experimental Eye Research, compared MGD patients to healthy individuals.
The research team identified a stark difference in bacterial populations, with MGD patients exhibiting 28 types of bacteria on their eyes compared to 12 in healthy subjects. Crucially, nearly all bacteria from MGD patients, 97%, could form biofilms, sticky layers that aid germ survival. This contrasts sharply with only 48% of bacteria from healthy individuals possessing this capability.
Furthermore, the composition of eyelid oil, known as meibum, also showed alterations in MGD patients. It contained higher levels of polar lipids and lower levels of non-polar lipids. This imbalance may affect how the oil spreads and how stable the tear film remains, potentially exacerbating dry eye symptoms.
These findings suggest a possible connection between altered eyelid oil composition and the prevalence of biofilm-forming bacteria. While the study highlights an imbalance in the eye's bacterial ecosystem and tear film stability in MGD, further research is needed to determine the causal relationship between these factors.
