Ahmad, A. ., N. Abdul Aziz, and . N. H. . Ozali. “The Effect of External Illumination on CSV-1000 Contrast Sensitivity Measure Among Young Adults”. Healthscope: The Official Research Book of Faculty of Health Sciences, UiTM, vol. 2, Aug. 2020, http://www.healthscopefsk.com/index.php/research/article/view/88.