Contamination of disinfection solution bottles used by contact lens wearers

Collins, Michael J., Coulson, John, Shuley, Vicki L., & Bruce, Adrian (1994) Contamination of disinfection solution bottles used by contact lens wearers. Contact Lens Association of Ophthalmologists Journal, 20(1), pp. 32-36.


We investigated the contamination of disinfection solution bottles after 2 weeks of patient use. Forty-four subjects participated in the study and each used three soft lens care systems (cross-over study). The order in which the three care systems were dispensed was randomized to eliminate systematic bias. Sixteen subjects used only one of the systems (disinfection solutions) over three consecutive 2-week periods (reliability study). Contamination of the disinfection solution bottles occurred in 12 of the 180 bottles sampled (7%), and the level of contamination of these bottles ranged up to 10(5) colony forming units per milliliter. A wide range of microorganisms was identified in these positive samples, many of which were potential ocular pathogens. None of the subjects in the study (n = 60) showed contamination in more than one of the three solution bottles sampled, suggesting that the phenomenon was not strongly patient specific. The rate of contamination of disinfection solution bottles was not influenced by contact lens wearing experience (i.e., familiarity with care procedures), by the time of year (season) at which the samples were collected, or by the subjects' compliance with hand washing. However, among the 44 subjects in the cross-over study, the rate of contamination of disinfection solution bottles was influenced by the type of disinfection solution.

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ID Code: 1459
Item Type: Journal Article
Refereed: Yes
Additional Information: Self-archiving of the author-version is not yet supported by this publisher.
For more information, please refer to the journal’s website (see link) or contact the author. Author contact details: Michael Collins, email:
Additional URLs:
ISSN: 1542-2321
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Copyright Owner: Copyright 1994 Lippincott Williams and Wilkins
Deposited On: 11 Oct 2005 00:00
Last Modified: 21 Jan 2013 06:07

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