Table 1.

Inclusion and exclusion criteria in a randomized clinical study on myopic Danish children.

Inclusion criteria	Exclusion criteria
Myopia –0.5 to –4.75 dioptres cycloplegic spherical in both eyes Regular astigmatism ≤ 2.5 dioptres in cycloplegia in both eyes Age 6 to 12 years at time of inclusion Anisometropia < 1.5 dioptres spherical equivalent Best‐corrected visual acuity of 78 ETDRS letters or better in both eyes Acceptance of treatment randomization One or both parents being ethnically Scandinavian	Manifest or latent squint Contraindications to the use of orthokeratology lenses (keratoconus, allergic conjunctivitis, keratoconjunctivitis sicca) Previous eye surgery Chronic eye disease demanding daily use of eye drops One or both parents being ethnic Middle Eastern, Asian, African, Latin American, Hispanic or Spanish

ETDRS = The Early Treatment Diabetic Retinopathy Study.