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Related Experiment Videos

Is your office safe? No.

R L Farris1

  • 1Department of Ophthalmology, College of Physicians and Surgeons, Columbia University, Edward S. Harkness Eye Institute, New York, New York 10037.

Cornea
|January 1, 1990
PubMed
Summary
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Contact lens fitting environments harbor microbial contamination. Using solutions with polyaminopropylbiguanide (PAPB) and frequent replacement of supplies can minimize contamination risks.

Area of Science:

  • Ophthalmology
  • Microbiology
  • Infectious Disease

Background:

  • Practitioner offices present significant microbial contamination risks during contact lens (CL) fitting.
  • Contamination sources include sinks, trial lenses, solutions, lens cases, and patient-related factors like fingers and cosmetics.

Purpose of the Study:

  • To highlight the risks of microbial contamination in contact lens fitting environments.
  • To emphasize the importance of disinfection over sterility and the need for monitoring office hygiene.

Main Methods:

  • Discusses common contamination reservoirs in CL fitting settings.
  • References studies on preservative efficacy and microbial resistance.
  • Suggests monitoring office hygiene through periodic cultures.

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Main Results:

  • Standard microbial testing panels may not represent office-specific organisms, which can develop preservative resistance.
  • Chlorhexidine-preserved solutions can become contaminated with Serratia marcescens within 7 days of opening.
  • Polyaminopropylbiguanide (PAPB) at 15 ppm appears effective in preventing contamination.

Conclusions:

  • Achieving complete sterility in CL fitting offices is unrealistic; disinfection is a more attainable goal.
  • Using solutions with 15 ppm PAPB and frequent replacement of supplies are recommended to avoid contamination.
  • Periodic cultures are crucial for monitoring the effectiveness of office disinfection protocols.