ChiCTR2000033904.

Study name	Clinical study of combined orthokeratology (OK lens) and 0.01% atropine solution to control myopia progression in children
Methods	Randomised cross‐over design
Participants	Inclusion criteria: children aged 8‐12 years; spherical equivalent myopia −1 D to −4 D; astigmatism < 1.5 D; anisometropia < 1.0 D; corrected vision ≥ 1.0; no history of eye surgery; no eye or systemic disease affecting vision Exclusion criteria: congenital or pathological myopia; premature infants and low birth weight; allergic to atropine; using other drugs or treatments to control myopia
Interventions	Intervention: combined OK and 0.01% atropine eye drops Comparison intervention: OK and placebo (blank solvent)
Outcomes	Primary outcome: myopia progression (AL, SER) Maximum follow up: not reported
Starting date	June 2020 Estimated end date: February 2022
Contact information	chictr.org.cn/com/25/hvshowproject.aspx?id=160051
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