Isolated distichiasis is a rare congenital eyelid anomaly characterized by an accessory row of eyelashes (that may be partial or complete) posterior to the normal row of cilia, at or close to the meibomian gland orifices, that is not associated with any other condition, and that may lead to ocular irritation and corneal damage if left untreated. The disease is Isolated distichiasis (Orphanet_99177).