“The Relationship of Pre-Operative Knowledge Levels With Anxiety Levels in Pre-Cataract Surgery Clients”. Promotion and Prevention in Mental Health 1, no. 1 (August 28, 2021): 16–20. Accessed February 6, 2026. https://saintekmedikanusantara.co.id/ojs/index.php/ppmhjournal/article/view/3.