Nayak, R., A. K. Sharma, S. K. Mishra, S. Bhattarai, N. K. Sah, and S. D. . Sanyam. “Smartphone Induced Eye Strain in Young and Healthy Individuals”. Journal of Kathmandu Medical College, vol. 9, no. 4, Jan. 2021, pp. 201-6, https://jkmc.com.np/ojs3/index.php/journal/article/view/951.