Editing Trichiasis (section)

==In dogs==
Trichiasis in [[dog]]s is hair from the eyelid growing in the wrong direction and rubbing on the eye, causing irritation.  It usually occurs at the lateral upper eyelid, especially in the [[English Cocker Spaniel]].<ref name=Gelatt_1999>{{cite book|editor=Gelatt, Kirk N.|title=Veterinary Ophthalmology|edition=3rd|publisher=Lippincott, Williams & Wilkins|year=1999|isbn=0-683-30076-8}}</ref>  Trichiasis also refers to hair from a nasal fold rubbing on the eye.  This type of trichiasis can be flattened by rubbing [[petroleum jelly]] onto it, but surgery is sometimes necessary for permanent correction.