Figure 3
From: Congenital nasolacrimal duct fistula in Brown Swiss cattle
Atypical openings and pigmentation of lacrimal duct fistulae. A) Large atypical opening 2 cm medial to the medial canthus of the right eye in a two-year-old daughter of bull A; B: Severely abnormal medial canthus and several fistulous openings of the right eye a in a one-year-old daughter of bull A; C) Nasolacrimal duct fistula with a pigmented oval opening in the left eye of a two-month-old daughter of bull A; D) Nasolacrimal duct fistula with a non-pigmented oval opening in the left eye of a seven-month-old daughter of bull A.