Abstract Objective To explore the relationship between accommodative amplitude and ocular biometric parameters in children with poor vision.Methods In a cross-sectional study conducted in 3 primary schools in the Miyun District of Beijing,300 students with poor vision in grades three and four were examined in July 2010.Cycloplegic autorefraction and retinoscopy,accommodative amplitude and ocular biometric parameters were measured in all participants.Subjects were divided into three groups based on the range of refraction: group A (+0.75 D≤SE≤-0.75 D),group B (-0.75 D<SE<-1.75 D) and group C (SE≥-1.75 D).Data were analyzed in each group with a Pearson correlation and linear regression.Results In group A,accommodative amplitude was associated with anterior chamber depth (r=-0.30,P=0.05).In group B,accommodative amplitude was correlated with refraction,axial length and anterior chamber depth.The Pearson correlation coefficients were 0.40,-0.41 and-0.40,respectively (P<0.05).However,there was no correlation with lens thickness,central corneal thickness or corneal curvature (P>0.05).In group C,there was no correlation between accommodative amplitude and any ocular biometric parameters (P>0.05).Conclusion In a defined range of refraction (-0.75 D<SE<-1.75 D),accommodative amplitude is correlated with refraction,axial length and anterior chamber depth.It is presumed that visual training may change the accommodative abnormality at the onset of myopia,and then indirectly and partially slow the progression of myopia.
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