Distichiasis is -
Abnormal inversion of eyelashes
Abnormal extra row of cilia
Abnormal eversion of eyelashes
Misdirected cilia
Congenital anomaly in which an extra row of cilia occupies the position of meibomian gland .Distichiasis is a rare disorder defined as the abnormal growth of lashes from the orifices of the meibomian glands on the posterior lamella of the tarsal plate Ref :Ak khurana 6th edition REF IMG
Diseases of orbit, Lids and lacrimal apparatus