Thapa, Raba. “Bilateral Optic Disc Pit, Bilateral Iris Chorioretinal Coloboma and Unilateral Congenital Ptosis in a Person With Persistent Patent Ductus Arterious: A Rare Case With Review of Literatures”. Archives of Clinical and Medical Case Reports 4, no. 2 (April 10, 2020): 302–306. Accessed June 15, 2026. https://fortunejournals.org/ojs/index.php/acmcr/article/view/22313.