Trichiasis refers to lashes misdirected towards the eye that rub the cornea and conjunctiva with every blink, while the eyelid remains in a normal position — which distinguishes it from entropion, where the whole eyelid turns inwards.
Causes
Most often, chronic blepharitis that distorts the lash follicles. More rarely: the aftermath of trauma, surgery or shingles, or no identifiable cause. Distichiasis (an extra row of lashes) is a particular form.
Symptoms
Foreign body or gritty sensation, red eye, watering, light sensitivity. Repeated rubbing can cause keratitis (corneal damage), or even an ulcer or corneal opacity if the problem is neglected.
Treatment
Epilation with tweezers brings immediate relief but the lash grows back in 4 to 6 weeks. For a lasting result, the follicle of the misdirected lash is destroyed by electrolysis (radiofrequency) under local anaesthesia, a procedure performed at the practice. For extensive trichiasis or when associated with an in-turned eyelid, surgery is offered.
Frequently asked questions
Is it serious?
Neglected trichiasis can permanently damage the cornea. Persistent discomfort with the feeling of a lash in the eye warrants a slit-lamp examination.
Is epilation enough?
It brings relief, but the lash always grows back. If the discomfort recurs, treating the follicle (electrolysis) gives a permanent result in most cases, sometimes after several sessions.
Is the treatment covered?
Yes: it is a functional treatment, covered by the Assurance Maladie.
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