UPPER AND LOWER EYELIDS AFFECTION

             It’s a congenital absence of a portion of an eyelid. It can occur in all species but it is most common in cats.  It’s a hereditary condition which associated with excessive evaporation and inadequate dispersion of the precorneal tear film, these lead to secondary keratoconjunctivitis, pain, and sometimes corneal ulceration.  If the lower eyelid is affected, epiphora may occur owing to escape of tears through the defect.

Fig.4: Superior eyelid agenesis in a cat (Belhorn et al, 1971).

 Treatment

-        Eyelid colobomas are repaired with a blepharoplastic surgery.