Factors Influencing the Transition From Physiological Hyperopia to Myopia in Children: Protocol for a Prospective Nested Case-Control Study

This prospective nested casecontrol study investigates the dynamic changes and regression patterns of physiological hyperopia in school-aged children and evaluates the associations between ocular biometric parameters and the onset of myopia. The findings are expected to support standardized myopia screening, inform clinical interventions, and provide evidence-based guidance for government policies on myopia prevention and control in young children.