Cycloplegia is required for accurate refraction of young adults in epidemiologic studies.
AIM To quantify the impact of the measurement of non-cycloplegic refraction on estimates of refraction and classification of refractive status in young adults. METHODS This cross-sectional analysis included 825 young adults (mean age 26.6±3.3y; 56.7% female) from the Guangzhou Twin Eye Study. All participants underwe...