Fibrosis of Extraocular Muscles, Congenital, 5, also known as cfeom5, is related to fibrosis of extraocular muscles, congenital, 1. An important gene associated with Fibrosis of Extraocular Muscles, Congenital, 5 is COL25A1 (Collagen Type XXV Alpha 1 Chain). Related phenotypes are ptosis and duane anomaly