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). https://doi.org/10.35749/58hn1993.