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A comparative study of techniques for decreasing contact lens storage case contamination
N D Larragoiti1, M E Diamos, P A Simmons
1Southern California College of Optometry, Fullerton 92631.
Journal of the American Optometric Association
|March 1, 1994
Summary
Rinsing contact lens cases with hot water and air drying effectively disinfects them, reducing infection risk. Regular case replacement is also recommended for optimal eye health.
Area of Science:
- Ophthalmology
- Microbiology
- Infectious Disease
Background:
- Contact lens storage cases can harbor pathogenic organisms, posing a risk for ocular infections.
- Effective disinfection of contact lens cases is crucial for preventing microbial contamination and eye infections.
Purpose of the Study:
- To evaluate the antimicrobial efficacy of different rinsing methods for contact lens storage cases.
- To determine the most effective disinfection strategy for preventing microbial growth in lens cases.
Main Methods:
- Contact lens cases were inoculated with Pseudomonas aeruginosa.
- Cases were subjected to four conditions: hot water rinse (no drying), hot water rinse with air drying, 3% hydrogen peroxide rinse with air drying, and a control (undisturbed).
- Disinfection rates were determined by culturing cases after 24 hours.
Main Results:
- Hydrogen peroxide rinse achieved the highest disinfection rate (99.5%).
- Hot water rinse with air drying was effective in 94.7% of cases.
- Hot water rinse without drying showed a lower efficacy (51.1%), with significant residual hydrogen peroxide detected in peroxide-treated cases.
Conclusions:
- Rinsing contact lens cases with hot water and air drying is a recommended disinfection method.
- Patients should be instructed on proper case hygiene, including rinsing, air drying, and regular replacement.
- These practices can significantly reduce the risk of ocular infections associated with contact lens wear.