Effect of Refraction and Axial Length on Childhood Optic Dik Parameter Meaured by Optical Coherence Tomography

Purpoe To ae the effect of refraction and axial length on optical coherence tomography (OCT) meaure of childhood optic dik parameter. Deign Population-baed cro-ectional tudy. Method Of 4,118 children examined in the ydney Myopia tudy (ydney Childhood Eye tudy) from 34 randomly elected primary chool and 21 econdary chool from 2003 through 2005, 3,529 (85.7%) were included in the analyi (1,395 6-year-old children [year 1 tudent] and 2,134 12-year-old children [year 7 tudent]). Comprehenive tandardized eye examination included bet-corrected viual acuity, cycloplegic autorefraction, biometry meaurement, and fat optic dik can uing OCT. Reult After adjuting for magnification, the mean optic dik area wa poitively aociated with axial length (Ptrend < .0001, both age group) but wa not aociated conitently with pherical equivalent refraction (ER). Concluion Optic dik parameter in childhood are influenced by axial length, but not by refractive error itelf.