Abstract
Objective To analyze the distribution characteristics of peripheral defocus in children's retina and the difference in refractive power of peripheral retina between myopic and non-myopic children.Methods This is a retrospective case study.We collected and analyzed the data of children aged 6～18 who had been treated at the ophthalmology depart-ment of Beijing Jiangong hospital from November 2023 to March 2024 and underwent multispectral refractive topography examination.Results A total of 124 cases were included,including 60 cases in the non-myopia group and 64 cases in the myopia group.The median diopter for the non-myopia group was 0.25(0.19,0.50)D,while the median diopter for the myopia group was-1.88(-2.44,-1.38)D.In the non-myopia group,the median values of total retinal defocus values(TRDV),retinal defocus values of the 15° retina(RDV-15°),RDV-30°,RDV-45°,retinal defocus values of the superior retina(RDV-S),retinal defocus values of the inferior retina(RDV-I),and retinal defocus values of the tempo-ral side retina(RDV-T)and retinal defocus values of the nasal side retina(RDV-N)were(-0.02)(-0.27,0.10),(-0.03)(-0.11,0.06),(-0.07)(-0.23,0.11),(-0.01)(-0.30,0.12),(-0.19)(-0.63,0.09),0.04(-0.25,0.22),0.24(-0.30,0.59),and 0.25(-0.08,0.76),respectively.In the myopia group,the median values of TRDV,RDV-15°,RDV-30°,RDV-45°,RDV-S,RDV-I,RDV-T,and RDV-N were 0.07(-0.14,0.22),(-0.04)(-0.11,0.03),0.02(-0.24,0.12),0.12(-0.21,0.17),(-0.42)(-0.83,-0.26),0.35(0.12,0.48),0.14(-0.18,0.59),and 0.50(0.14,0.74),respectively.The defocus values of the superior and inferior of the peripheral retina,as well as on the nasal and temporal sides,was asym-metric,and the nasal hyperopia was greater.The peri-retina of non-myopic children was myopic defocused,while the peri-retina of myopic children was hyperopic defocused.However,there was no statistically significant difference in the refractive status of the retina between the non-myopia and myopia groups(P＞0.05).In the myopia group,the 45° field view was with the highest defocus in hyperopia,and RDV-45°＞RDV-30°＞RDV-15°.Conclusions The refractive power of the peripheral retina is asymmetric distributed in children,with hyperopic defocus on the nasal side.The peripheral retina of non-myopic children is myopic defocused,while the peripheral retina of myopic children is hyperopic defocused,but there is no significant difference in peripheral retinal refraction between the two groups.In the myopia group,the further away from the macula,the more pronounced the hyperopia defocus.关键词
多光谱屈光地形图/视网膜/周边离焦Key words
Multispectral refraction topography/Retina/Peripheral defocus
