What is the appropriate age cut-off for cycloplegia in refraction?

Purpose: To investigate the age range for which cycloplegia provides additional information compared with non-cycloplegic refraction in teenagers and young adults.

Methods: Data for 1295 subjects (704 female; 591 male) from the Twins Eye Study in Tasmania (TEST) and the Brisbane Adolescent Twin Study (mean age: 19.65 ± 3.