Almutleb, E. S.; El-Hiti, G. A.-R.; Alotibi, F. M.; Al-Grian, M. M.; Almutairi, M. S.; Masmali, A. M. The Effect of Beverages Containing Caffeine on the Tear Film Parameters: An Observational Study. J Pak Med Assoc 2025, 75, 1397-1401.