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We thank Koerner and Grzybowski [1] for their comments regarding the study on the effect of diluting povidone-iodine (PI) on bacterial growth associated with speech [2]. We agree that there are no standardized reliable ways to simulate the ocular surface to analyse this in vitro, and stress that the emphasis of this study design is to add to the evidence base. This study demonstrated the differences in PI dilution and significant bacterial culture growth with bacterial droplet dispersal associated with speech. Whilst there is evidence to suggest lower doses of PI is effective [3], we note that other evidence suggest that these lower doses require several applications [4]. Clinicians adopt varying strategies for antisepsis with PI, which to this day remains efficient, economical and effective [5]. Clinicians should prudently consider effective PI application, and we again thank Koerner and Grzybowski for encouraging debate and raising the profile of this issue.
Acknowledgements
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Ethics approval and consent to participate
This study was originally approved by The Royal Victorian Eye and Ear Hospital’s human research ethics committee and involved a series of healthy participants. Written informed consent was obtained from all study participants.
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Competing interests
The authors declare that they have no competing interests.
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