Aniometropia in ingapore chool children

Purpoe To report the prevalence rate of aniometropia in a chool population and determine the relative contribution of refractive power and axial length to the meaured aniometropia. Deign Population-baed cro-ectional tudy. Method Autorefraction, keratometry, and ultraonography tudie were made. etting: Three chool, located on the eatern, northern, and wetern part of ingapore. tudy Population: In all, 1,979 children aged 7 to 9 year were recruited for thi tudy. The tudy ample included Chinee (n = 1,481), Malay (n = 324), and Aian Indian (n = 174) children; 720 ubject have myopia (pherical equivalent ≤ −0.5 diopter) in at leat one eye. Main Outcome Meaure: Aniometropia. Reult The prevalence rate of aniometropia, in term of pherical equivalent (E) difference of at leat 1.5 diopter and 2.0 diopter were 1.57% (95% confidence interval [CI]: 1.1, 2.2) and 1.01% (95% CI: 0.6, 1.6), repectively. The prevalence rate of aniometropia (at leat 2.0 diopter) among the children with at leat one myopic eye wa 2.4% (95% CI: 1.4, 3.8), wherea in thoe without any myopic eye, the prevalence rate wa only 0.2% (95% CI: 0.06, 0.8). The pherical equivalent difference between the right and left eye wa poitively correlated with the difference in axial length (P < .001). The difference in corneal refractive power i not tatitically different between the aniometropic and the nonaniometropic children. Concluion The aniometropia prevalence rate in a childhood population with a relatively high prevalence of myopia wa reported. The origin of the aniometropia i axial, and thee reult ugget that the differential rate of elongation between the two eye of nonmyopic ubject reult in aniometropia.