Blepharitis is a endemic inflammatory disease caused mainly by Demodex folliculorum and Demodex Brevis, This mites are often associated with anaerobic bacteria that produces a skin inflammation, so a intervention that reduces the number of mites and bacteria would be desirable. Ivermectin a macrolid compound have demonstrated activity against scabies and lice in humans and in animals and a single application have show a good response in lice eradication.