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Clinical Case-control Study of Postoperative Ocular Microbiota Colonization Using Microbial Analysis in Patients
Hejia Zhao1,2, Yanjun Chen1,3, Huamin Mao1
1From the Department of Ophthalmology, Nanfang Hospital Branch, Southern Medical University, Guangzhou, Guangdong, China.
Plastic and Reconstructive Surgery. Global Open
|June 18, 2025
Summary
Blepharoplasty surgery alters the ocular surface microbiome, increasing pathogenic bacteria and reducing diversity. This microbial shift may cause post-surgical eye discomfort, independent of patient age or sex.
Area of Science:
- Ophthalmology
- Microbiology
- Plastic Surgery
Background:
- Blepharoplasty is a common plastic surgery procedure globally.
- The effect of blepharoplasty on the ocular surface microbiota is not well understood.
- Investigating these microbial changes is crucial for understanding potential ocular surface alterations.
Purpose of the Study:
- To analyze the changes in the ocular surface microbiota following blepharoplasty.
- To compare the microbial composition of patients undergoing blepharoplasty with a control group.
- To identify specific bacterial species associated with blepharoplasty.
Main Methods:
- A case-control study involving 30 blepharoplasty patients and 23 controls.
- Ocular surface swabs were collected for bacterial analysis.
- 16S rRNA sequencing and bioinformatics analysis were employed to determine microbial composition and abundance.
Main Results:
- Blepharoplasty patients exhibited increased colonization by pathogenic bacteria compared to controls.
- Alpha diversity analysis revealed significantly higher bacterial abundance in the surgical group.
- Beta diversity analysis demonstrated distinct microbial community structures between the groups.
Conclusions:
- Blepharoplasty may compromise the ocular mucosal barrier, leading to pathogenic bacterial colonization.
- The observed microbial imbalance could contribute to postoperative ocular discomfort or dysfunction.
- Age, sex, and surgery frequency did not significantly impact the microbial profile in blepharoplasty patients.

