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In vivo confocal microscopy as a novel and reliable tool for the diagnosis of Demodex eyelid infestation
  1. Matthieu Randon1,2,3,4,5,
  2. Hong Liang1,2,3,4,5,
  3. Mohamed El Hamdaoui1,2,
  4. Rachid Tahiri1,2,
  5. Laurence Batellier6,
  6. Alexandre Denoyer1,2,3,4,5,
  7. Antoine Labbé1,2,3,4,5,7,
  8. Christophe Baudouin1,2,3,4,5,7
  1. 1Department of Ophthalmology III, Quinze-Vingts National Ophthalmology Hospital, Paris, France
  2. 2Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, DHU ViewMaintain, INSERM-DHOS CIC, Paris, France
  3. 3INSERM, U968, Paris, France
  4. 4Sorbonne Universités, UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris, France
  5. 5CNRS, UMR_7210, Paris, France
  6. 6Department of Medical Biology, Quinze-Vingts National Ophthalmology Hospital, Paris, France
  7. 7Department of Ophthalmology, Ambroise Paré Hospital, APHP, University of Versailles Saint-Quentin en Yvelines, Versailles, France
  1. Correspondence to Professor Christophe Baudouin, Department of Ophthalmology III, Quinze-Vingts National Ophthalmology Hospital, 28, rue de Charenton, Paris 75012, France; cbaudouin{at}quinze-vingts.fr

Abstract

Aims Demodex mites are implicated in several ocular surface diseases such as blepharitis, ocular rosacea and dry eye syndrome. Demodex eyelid infestation is classically diagnosed by analysing depilated eyelashes under the light microscope. The use of in vivo confocal microscopy (IVCM) could be an easy way to improve its diagnosis. The ability of IVCM to identify Demodex was evaluated and compared with the classic depilation method.

Methods Eight healthy subjects, 22 patients with dry eye syndrome without anterior blepharitis and 18 patients with anterior blepharitis were examined using lower eyelid IVCM (lash follicles and meibomian glands (MGs)). Twenty-five of the 48 subjects underwent both an IVCM examination and classic depilation to compare the two methods. Ex vivo Demodex obtained from lash depilation were also analysed using the confocal microscope.

Results IVCM found 100% of the mite infestations among patients with anterior blepharitis, 60% among dry eye patients without blepharitis and 12% in healthy subjects, whereas the depilation technique found 100%, 50% and 0%, respectively. Demodex brevis and Demodex larvae inside the lash follicles were better detected by IVCM. In symptomatic patients, the Demodex infestation was often associated with MG dysfunction, which was better characterised using IVCM in symptomatic patients (60% and 40% of meibomianitis and gland fibrosis, respectively).

Conclusions IVCM is an efficient and reliable tool for the diagnosis of eyelid mite infestation and may also provide an evaluation of MGs.

  • Ocular surface
  • Eye Lids
  • Imaging
  • Microbiology

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