Chen A H, O'Leary D J
Department of Optometry, Faculty of Allied Health Sciences, National University of Malaysia, Kuala Lumpur, Malaysia.
Optometry. 2000 Jul;71(7):454-8.
The purpose of this study was to investigate and compare the accommodative accuracy of pre-school children between free-space accommodative stimulus and minus lens-induced accommodative stimulus.
The accommodative responses of 59 pre-school children, ages 2 to 5 years, were measured objectively with a Canon Autoref R-1 under two different conditions, giving an optical accommodative stimulus of 1 D; first, viewing a target placed 100 cm away (free-space stimulus), and second, viewing a distant target through a -1.00 D lens.
The mean lag of the accommodative response for the free-space accommodative stimulus is 0.24 D, while the mean lag of the accommodative response with the minus lens-induced accommodative stimulus is 0.69 D. The lag of accommodative response for free-space accommodative stimulus is significantly lower than the lag of accommodative response for minus lenses.
Pre-school children can accommodate more accurately toward a free-space accommodative stimulus, as compared with minus lens-induced accommodative stimulus.
本研究旨在调查和比较学龄前儿童在自由空间调节刺激和负透镜诱导调节刺激下的调节准确性。
使用佳能自动验光仪R-1客观测量了59名2至5岁学龄前儿童在两种不同条件下的调节反应，给予1 D的光学调节刺激；首先，观察放置在100 cm远处的目标（自由空间刺激），其次，通过-1.00 D透镜观察远处目标。
自由空间调节刺激下调节反应的平均滞后为0.24 D，而负透镜诱导调节刺激下调节反应的平均滞后为0.69 D。自由空间调节刺激下调节反应的滞后显著低于负透镜调节反应的滞后。
与负透镜诱导的调节刺激相比，学龄前儿童对自由空间调节刺激的调节更准确。
