Spherical Equivalent Percentile Curves in a Portuguese School-Aged Population.

ABSTRACT: Bacground/Objectives: This study aimed to develop age- and sex-specific spherical equivalent (SE) percentile curves and estimate the prevalence of refractive errors (REs) in Portuguese schoolchildren aged 6-17 years. Methods: A cross-sectional study was conducted in three schools in Lisbon, including 2205 children (mean age = 9.3 ± 2.6 years; 49.3% boys). Vision was assessed using non-cycloplegic static retinoscopy (chosen due to feasibility in school settings) and visual acuity tests. SE percentile curves (P5-P95) were generated by age and sex. SE values and RE distribution (hyperopia, emmetropia, and myopia) were compared across four age groups (6-8, 9-11, 12-14, and 15-17 years). Results: SE values decreased significantly with age (p < 0.001). Median SE range

SUBMITTER: Penaloza-Barbosa MI 

PROVIDER: S-EPMC12565688 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature