The eyelash follicle features and anomalies : a review
Article [Version publiée]
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Journal of optometry ; vol. 11, no 4, p. 211-222.Éditeur·s
ElsevierAffiliation
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Résumé·s
The primary role of eyelashes is to protect and maintain the health of the lid margin.
However, the mechanisms to fulfill this role are not fully understood. Unraveling these mechanisms will stand to greatly improve the efficiency of eye care professionals’ interventions in
anomalies of the eyelashes. The aim of this article is to provide a review on eyelashes including highlights and new avenues for research; the biology of both the lash and its follicle; the
pathophysiology and management of lash anomalies by eye care professionals; and the effect of
iatrogenic factors on lashes. Using the database of Ovid MEDLINE, we reviewed studies specifically directed on human/mammalian eyelashes and key articles on current trends in scalp hair
methodologies that can be applicable to lash research. The eyelash morphology, pigmentation
and growth rate have been documented using techniques ranging from lash imaging to follicle
immunohistochemistry. Furthermore, studies have demonstrated that the lash follicle is sensitive to many factors of the external environment, a variety of systemic/topical medications
and cosmetics. Recently, aerodynamic studies using a mammalian eye model confirmed that
an optimal lash length was needed so that eyelashes serve a protective role in reducing the
number of particles that can reach the eye. Despite recent advances in lash research, studies
are still scarce, due to the limited availability of the human lid for sampling. This review brings
awareness that further research is needed with respect to eyelashes and will hopefully reduce
the gap with scalp hair research.
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