Singh, Satendra, Sood Sushma, Sethi Jyoti, and Beena . 2007. “Validity of Visual Evoked Response in Measuring Ethambutol Induced Optic Neuritis in Tuberculosis Patients: Evaluation Using Receiver Operating Characteristic (ROC) Curves”. Pakistan Journal of Physiology 3 (2). https://pjp.pps.org.pk/index.php/PJP/article/view/643.