Accommodation Function in Malaysian Chinese Primary School Children
Abstract
Measurement of accommodation functions are crucial component while diagnosing non strabismic binocular vision anomalies. The effect of race has been reported to influence the accommodation norms especially during school age. Therefore, the aim of this study to provide a baseline data of accommodation functions for Malaysian Chinese primary schoolchildren. A cross sectional study was conducted with total subject of 50 Malaysian Chinese primary school children age 8-12 years old (9.6±1.2 years). Amplitude of accommodation (AA) was measured by Donder’s push-up method, response of accommodation and facility of accommodation (FA) was measured by Monocular Estimation Method (MEM) and ±2.00DS flipper lens respectively, and relative accommodation was measured using minus and plus lenses. The mean of monocular and binocular AA was 11.23±1.76 D and 11.36±2.27 D respectively. The mean and standard deviation was 0.93±0.18D for response of accommodation, 10.48±2.57 cycle per minute (cpm) and 8.84±2.28 cpm for monocular and binocular FA respectively, -2.44±0.96D for positive relative accommodation (PRA), and +2.42±0.51D for negative relative accommodation (NRA). Analysis of Variance showed that no significant variation of accommodation functions across age groups except for monocular AA (p=0.024) and binocular AA (p=0.028). However, this study found significant difference for most of accommodation functions compared with predetermined values from previous study (p<0.05). The data presented in this study can be used as a baseline while diagnosing accommodation anomalies among Malaysian Chinese primary school-aged children.
Keywords: Accommodation Functions, Malaysian Chinese, Primary School Children