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BioMed Research International
Volume 2015, Article ID 259109, 7 pages
Research Article

Demodex sp. as a Potential Cause of the Abandonment of Soft Contact Lenses by Their Existing Users

1Medical Centre KOL-MED SP ZOZ, Plac Dworcowy 6, 33-100 Tarnow, Poland
2Department and Clinic of Ophthalmology, 1st Faculty of Medicine, Medical University of Warsaw, Ulica Lindleya 4, 02-005 Warsaw, Poland
3Department of General Biology and Parasitology, Medical University of Warsaw, Ulica Chałubińskiego 5, 02-004 Warsaw, Poland
4Institute of Parasitology, Polish Academy of Sciences, Ulica Twarda 51/55, 00-818 Warsaw, Poland

Received 22 May 2015; Revised 25 June 2015; Accepted 5 July 2015

Academic Editor: Jose Manuel González-Méijome

Copyright © 2015 Witold Tarkowski et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Demodex mites may be a potential etiological factor in the development of various eye and skin disorders. The aim of the study was to investigate the presence of Demodex in the hair follicles of eyelashes and their potential influence on abandoning soft contact lenses which had been previously well tolerated by their users. A group of 62 users of contact lenses (28 with emerging discomfort and 34 without discomfort) were examined. There is a need to check the existence of a relationship between D. folliculorum or/and D. brevis infestation and the emergence of intolerance to the presence of soft contact lenses. The removed lashes were examined under light microscopy, applying standard parasitological methods if demodicosis is suspected. A positive result was assumed if at least one adult stage, larva, protonymph/nymph, or egg of D. folliculorum and/or D. brevis was present. A positive correlation was observed between the presence of Demodex and intolerance to contact lenses by their existing users , and Demodex sp. infections were observed in 92.86% of patients with intolerance to contact lenses. Our results provide further evidence for the pathogenic role played by the mites in the development of eye diseases.