Objective To investigate the effects of different colors on accommodation in emmetropic children when viewing a visual display terminal (VDT).Methods Fourteen emmetropic children with normal color vision were enrolled in this cross-sectional study.They were required to read 7 automatically activated text displays on a VDT at 50 cm.The 7 texts were presented in 2series of patterns.The first series of patterns was set according to the background color, including black/white,white/red,white/green,white/blue.The second series of patterns was set according to the character color, including black/white, red/white, green/white, blue/white. Accommodative response was measured with an objective infrared autorefractor.The difference in accommodative response,accommodative lag and corrected accommodative lag among groups were then compared, using the randomized blocks analysis of variance.Results All the fourteen emmetropic children successfully completed the task.There were no statistically significant differences in the mean accommodative response (F=0.282,P=0.946) and accommodative lag (F=0.281,P=0.945) among the 7 texts.After correcting for longitudinal chromatic aberration, the mean accommodative lags were (0.77±0.21)D,(0.98±0.26)D,(0.34±0.23)D, (-0.26±0.25)D,(0.96±0.27)D, (0.30 ±0.28)D,and (-0.23±0.26)D,respectively. Multiple comparisons with the Bonferroni test showed that there were statistically significant differences between each pair of groups (P<0.01) except that between black/white and red/white.Conclusion Greater accommodative lag is detected in emmetropic children when reading texts in long wavelength light.The lag tend to reduce the response to short wavelength light and even accommodative lead is found to some extent for blue light.
朱晓伟,付东,蓝卫忠,王冬梅,赵峰,杨智宽. 正视儿童视近条件下对显示终端不同颜色光线的调节反应[J]. 中华眼视光学与视觉科学杂志, 2011, 13(6): 449-456.
ZHU Xiao-wei,FU Dong,LAN Wei-zhong,WANG Dong-mei,ZHAO Feng,YANG Zhi-kuan. Effects of different colors on accommodation in emmetropic children when viewing a visual display terminal. Chinese Journal of Optometry Ophthalmology and Visual science, 2011, 13(6): 449-456. DOI: 10.3760/cma.j.issn.1674-845X.2011.06.013