Peer-reviewed veterinary case report
Pseudomonas bacteria stick more to orthokeratology lenses than
By Choo, Jennifer D et al.·Published in Optometry and vision science : official publication of the American Academy of Optometry·2009·Institute for Eye Research, United Kingdom·View original on PubMed →
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Original publication title: Adhesion of Pseudomonas aeruginosa to orthokeratology and alignment lenses.
- Species:
- cat
Plain-English summary
A group of 18 one-year-old cats was tested to see if special contact lenses for reshaping the cornea (orthokeratology lenses) collected more bacteria than standard contact lenses after being worn. After wearing periods of 2 and 6 weeks, the lenses were soaked in a common bacteria (Pseudomonas aeruginosa) and then worn again. The results showed that the orthokeratology lenses had significantly more bacteria on them compared to the standard lenses after wear, which could increase the risk of eye infections. It's important for cat owners using these lenses to be educated on proper cleaning methods to prevent infections.
People also search for: cat eye infection contact lenses · how to clean cat orthokeratology lenses · bacteria on cat contact lenses
Abstract
PURPOSE: To determine whether contact lenses designed for orthokeratology (OK) are colonized by greater numbers of bacteria compared with standard (alignment fitted) design rigid gas permeable lenses before and after lens wear. METHODS: Eighteen 1-year-old cats were randomly fitted with an OK lens in one eye and an alignment fitted (AF) lens in the other eye. Both lenses were made in the same diameter and central thickness and of the same material. Two separate wearing periods of 2 weeks and 6 weeks were used. After each wearing period, lenses were soaked in Pseudomonas aeruginosa (6294 or 6206) for 10 min. The lenses were then reinserted onto their respective corneas for a wearing period of 16 hours after which lenses were collected and remaining adhered bacteria quantified. Unworn control lenses were also soaked and bacteria enumerated for comparison. RESULTS: There were no significant differences in the number of bacteria adherent to unworn AF and OK lenses. Analysis of lenses after wear showed OK lenses retained significantly higher numbers of viable bacteria than AF lenses in all studies. CONCLUSIONS: OK lenses retain more bacteria than AF rigid gas permeable lenses after bacteria-loaded overnight lens wear. This may increase the risk for an infection in OK patients should suitable conditions be present. Specific education on the cleaning of OK lenses is essential.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/19156013/