You are correct. Congenital ankyloblepharon (congenital eyelid band syndrome) is caused by abnormal eyelid separation during fetal development. Incomplete eyelid separation results in tissue remnants connecting the upper and lower lids. It is usually an isolated sporadic finding, but has been reported in association w/ cleft lip and palate, trisomy 18, imperforate anus, and cardiac anomalies. If the visual axis is restricted, prompt separation is needed for normal visual development.