Majumder Chiranjib, Afnan Hakim
School of Optometry, Faculty of Medicine and Health Sciences, UCSI University, Kuala Lumpur, Malaysia.
Korean J Ophthalmol. 2020 Jun;34(3):219-226. doi: 10.3341/kjo.2019.0138.
The purpose of the study was to establish baseline data for amplitude of accommodation (AA) measured using both subjective and objective techniques in students at a private Malaysian university.
This cross-sectional study was conducted including 34 healthy participants with a mean age of 22.26 ± 1.88 years. AA was measured using dynamic retinoscopy and the push-up, pull-away, modified push-up, and minus-lens techniques.
The mean AA scores for the push-up, pull-away, minus-lens, and modified push-up techniques and dynamic retinoscopy were 11.38 ± 2.03, 10.35 ± 1.64, 9.24 ± 1.18, 8.26 ± 1.44, and 7.2 ± 1.0 diopters, respectively. No AA measurements showed significant difference among ethnicities (Chinese, Malay, and Indian). This study suggested that AA obtained using push-up ( = 0.005) and pull-away ( = 0.017) methods and dynamic retinoscopy ( = 0.041) were significantly different according to sex. No significant difference was observed in AA for the minus-lens ( = 0.051) and modified push-up ( = 0.216) techniques by sex. A moderately negative correlation was found between AA and age for the push-up ( = -0.434, = 0.010), pull-away ( = -0.412, = 0.016), and minus-lens ( = -0.509, = 0.002) techniques and dynamic retinoscopy ( = -0.497, = 0.003). A weak negative correlation was found between age and AA measured using a modified push-up technique ( = -0.393, = 0.022).
Mean AA was highest for the push-up technique, followed by the pull-away technique, the minus-lens technique, the modified push up technique, and dynamic retinoscopy. The push-up and pull-away methods and dynamic retinoscopy showed a significant difference in measurement of AA between sexes.
本研究的目的是为马来西亚一所私立大学的学生使用主观和客观技术测量调节幅度（AA）建立基线数据。
本横断面研究纳入了34名健康参与者，平均年龄为22.26±1.88岁。使用动态检影法以及上推法、后拉法、改良上推法和负透镜法测量AA。
上推法、后拉法、负透镜法、改良上推法和动态检影法的平均AA值分别为11.38±2.03、10.35±1.64、9.24±1.18、8.26±1.44和7.2±1.0屈光度。各民族（华人、马来人和印度人）之间的AA测量值无显著差异。本研究表明，根据性别，使用上推法（P = 0.005）、后拉法（P = 0.017）和动态检影法（P = 0.041）测得的AA有显著差异。按性别，负透镜法（P = 0.051）和改良上推法（P = 0.216）测量的AA无显著差异。上推法（r = -0.434，P = 0.010）、后拉法（r = -0.412，P = 0.016）、负透镜法（r = -0.509，P = 0.002）和动态检影法（r = -0.497，P = 0.003）测量的AA与年龄之间存在中度负相关。使用改良上推法测量的年龄与AA之间存在弱负相关（r = -0.393，P = 0.022）。
上推法的平均AA最高，其次是后拉法、负透镜法、改良上推法和动态检影法。上推法、后拉法和动态检影法在两性AA测量上存在显著差异。
