Azmat Ilyas, and Duaa Fatima. “Comparison of Contrast Sensitivity in Low and High Hypermetropes”. Ophthalmology Pakistan, vol. 13, no. 1, Jan. 2023, pp. 21-25, https://ophthalmologypakistan.com/op/ojs3.3/index.php/ophth_pakistan_journal/article/view/59.