Influence of orthokeratology lens treatment zone decentration on myopia progression: a systematic review with meta-analysis

Background: Referring to the myopia control efficacy, the difference between the orthokeratology with decentration (OKD group) and orthokeratology with center-position (OKC group) as control group is not clear currently. Therefore, the aim of this meta-analysis was to investigate the effect of decentration on myopia control efficacy based on existing studies.