Optical Defocus Rapidly Changes Choroidal Thickness in Schoolchildren Wang, Danyang ; Chun, Rachel Ka Man ; Liu, Manli ; Lee, Roger Pak Kin ; Sun, Yuan ; Zhang, Ting ; Lam, Chuen ; Liu, Quan ; To, Chi Ho Abstract Publication: PLoS ONE Pub Date: August 2016 DOI: 10.1371/journal.pone.0161535 Bibcode: 2016PLoSO..1161535W