Effectiveness of Eight Weeks Pencil Push Up Therapy for Patients with Convergence Insufficieny in Mohammad Hoesin Hospital Palembang. sjo [Internet]. 2018 Jun. 18 [cited 2026 Aug. 10];1(1):18-26. Available from: https://www.sriwijayaopthalmology.com/index.php/sjo/article/view/42