Echieh , Chigozie I., Eni Egbula, Akontachi Besong, and Ibanga Affiong. “Assessment of Topical Drug Instillation Techniques Among Glaucoma Patients in a Tertiary Institution in Nigeria”. Transactions of the Ophthalmological Society of Nigeria 6, no. 1 (August 1, 2021). Accessed April 19, 2025. https://tosn.org.ng/index.php/home/article/view/63.