注视视频终端对视觉功能的影响

Effects of short-term VDT usage on visual functions

目的了解短期注视视频终端(VDT)对视功能和眼生理的影响。方法选择21名受试者,进行持续1h的计算机操作(注视VDT),操作前后分别行验光、调节幅度、集合近点、AC/A、远及近距离水平隐性斜视、正负融像性聚散能力、泪膜破裂时间(BUT)及像差测定,并与该组受检者近距离书本阅读进行比较。结果VDT操作后受试者较近距离书本阅读更易出现调节幅度降低、集合近点远离、近距离外隐性斜视幅度增加,前后比较差异有统计学意义(P<0.05);VDT可使BUT缩短,像差增加,前后比较差异有统计学意义(P<0.05)。但AC/A、正负融像性聚散能力、远距离隐性斜视幅度的差异无统计学意义(P>0.05)。结论VDT操作较书本阅读更易对人视觉功能产生影响,VDT操作可对泪膜性状和视觉质量产生暂时的影响。(中华眼科杂志,2005,41:986-989)

Objective To evaluate the effects of short-term VDT usage on visual functions. Methods Visual function of the video display terminal （VDT） operators before and after 1 hour VDT usage were assessed. These included refraction, amplitude of accommodation, near point of convergence, AC/A, phorias, fusional convergence and divergence, tear film break time （BUT） and aberrations . And the same situation was compared was the non-VDT usage. Results In comparison with pre-VDT use, amplitude of accommodation, BUT were significantly decreased （ P 〈 0.05 ）, near point of convergence, near lateral exophoria were significantly increased after VDT use （ P 〈 O. 05 ）. Total, high order, 4th and 5th order aberrations were significantly greater after VDT use （P 〈 0.05 ）. Conclusions Short-term VDT work does have a significantly greater temporarily effect on visual function, tear film quality and visual quality.