Basharat Hussain, Rashida Riaz, and Ummara Rasheed. “Comparative Study of Dry Eye Syndrome at High Altitude and Low Altitude Regions”. Ophthalmology Pakistan, vol. 12, no. 1, Jan. 2023, pp. 16-19, https://ophthalmologypakistan.com/op/ojs3.3/index.php/ophth_pakistan_journal/article/view/9.