MARCO ANGELO LIWAN, MARLYANTI NUR RAHMAH, HABIBAH SETYAWATI MUHIDDIN, FIRDAUS KASIM, NOOR SYAMSU, AHMAD ASHRAF AMALIUS. THE RELATION BETWEEN SMARTPHONE USAGE IN CHANGES OF OCULAR BIOMETRY COMPONENTS AND REFRACTION AMONG ELEMENTARY SCHOOL CHILDREN: Oral Presentation - Observational Study - Ophthalmologist. OI. 2024;49(S2). doi:10.35749/58hn1993