Title: Choroidal thickness and its relevant factors in 8-10 years old children with normal vision
Abstract:Objective To observe choroidal thickness (CT) and its relationship to refraction and axial length (AL) in children 8-10 years old with normal vision.Methods In this cross-sectional study,75(150 eyes) ...Objective To observe choroidal thickness (CT) and its relationship to refraction and axial length (AL) in children 8-10 years old with normal vision.Methods In this cross-sectional study,75(150 eyes) 8-10 years old children with normal vision were enrolled.Standard optometric refractive error was used to divide the children into three groups,a hyperopic group (A),an emmetropic group (B) and a myopic group (C).Using axial length (AL) tertiles,the children were divided into the following groups:20.35-22.42 mm group (D1),>22.42-24.49 mm group (D2),and >24.49-26.56 mm group (D3).Thickness in the enhanced images of the EDI SD-OCT apparatus can be obtained with a cross-sectional view of the choroid by using the scan line distance from the fovea with both horizontal and vertical scans.The choroidal thicknesses from the 9 macular sectors were used.Subfoveal choroidal thickness (SFCT) and CT at 1 mm/3 mm nasal,temporal,superior,and inferior to the fovea (N1,T1,S1,I1,N3,T3,S3,I3) were measured.The differences in CT between the different quadrants were compared for gender,eyes,refraction and AL.Results The average SFCT was 297.44±55.32 μm.When the SFCT was compared to each of the CT quadrants,only N1,N3 and I3 showed statistically significant differences (P<0.05).The differences in the SFCT values between girls and boys were statistically significant (t=-3.00,P<0.01).SFCT values for hyperopic girls were greater than for emmetropic and myopic girls.The differences were statistically significant (P<0.05).The difference between emmetropic and myopic girls was not statistically significant (P>0.05).There were no statistically significant differences between the refractive groups of boys (P>0.05) or for their different axial length groups (P>0.05).There was a positive correlation between refractive status and SFCT (r=0.435,P<0.05).And there was a negative correlation between SFCT and AL (r=-0.542,P<0.05).Multiple linear regression analysis showed that with each additional 1 mm increase in axial length,SFCT decreased 23.58 μm ((Y)=848.82-23.58X).Conclusion The average SFCT in children 8-10 years old with normal vision was 297.44±55.32 μm.Axial length is the main influence affecting choroidal thickness.
Key words:
Choroidal thickness; Macula lutea; Refraction errors; Children; Tomography,optical coherence; AxiaRead More
Publication Year: 2014
Publication Date: 2014-11-25
Language: en
Type: article
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