Fig. 1From: Long-term follow-up of changes in ocular biometric parameters in orthokeratology lens wearers with relatively large-scale axial length reductionFlow chart of the study. SER, spherical equivalent refraction error; AL, axial length; ΔAL, change in AL (AL at the one-year visit − AL at baseline); Ortho-K, orthokeratology. D, dioptersBack to article page