Sabahat Zubair, Arif Hussain, Nishat Wali, and Maryam Sajid. “Association of Caffeine Intake With Pupil Size and Visual Acuity”. Ophthalmology Pakistan, vol. 13, no. 2, Sept. 2023, pp. 32-36, https://ophthalmologypakistan.com/op/ojs3.3/index.php/ophth_pakistan_journal/article/view/69.