Contact Lenses Change the Community of Bacteria on Eyes

"Wearing contact lenses may change the community of bacteria living in your eyes, according to a small new study." That's the word from Discovery.com. "In the study, the surface of the eye in the people who wore contact lenses had triple the proportion of certain bacteria species, on average, compared with the people in the study who did not wear the lenses, researchers found. Moreover, the researchers found differences in the composition of the bacterial community on the surface of people’s eyes. In the people who wore contact lenses, this composition more closely resembled the bacteria on the individuals’ eyelids, as compared to the nonwearers. The study included nine people who wore contacts and 11 who did not." Read more.

In a more detailed version of the study, Medical News Today reported: "Presenting their work at the annual meeting of the American Society for Microbiology on May 31st in New Orleans, LA, the NYU Langone researchers report that micro-organisms residing in the eyes of people who wear contact lenses daily more closely resemble micro-organisms residing in eyelid skin than the bacteria usually found in the eyes of people who do not wear contacts. The researchers took hundreds of swabs of different parts of the eye, including the skin directly beneath the eye. Genetic analysis of swabs and used contact lenses allowed the team to identify which bacteria were present. Comparing nine contact lens wearers with 11 non-contacts users, the team found three times the usual proportion of the bacteria Methylobacterium, Lactobacillus, Acinetobacter and Pseudomonas on the eye surfaces (conjunctiva) of contact lens wearers than on the eye surfaces of the control group. Examining the bacterial diversity using a plotted graph, the team observed that the eye microbiome of contact lens wearers is more similar in composition to the microbiome of their skin than the eye microbiome of non-lens wearers." Read more.