摘要目的 探讨长时间操作视屏显示终端(VDT)对作业人员视力和眼部血管血流动力学的影响.方法 于2015年3至10月,采用单纯随机抽样法抽取从事视屏监控作业的120名男性作为观察组,155名后勤人员作为对照组.对两组人员进行眼部视力检查,应用彩色多普勒血流显像技术(CDFI)测量其视网膜中央动脉(CRA)、睫状后短动脉(SPCA)以及睫状前动脉(ACA)的收缩期峰值流速(PSV)、舒张末期流速(EDV)和阻力指数(RI).结果 观察组视力为[0.8(0.4~1.2)],明显低于对照组[1.2(0.8~1.5)],差异有统计学意义(P<0.05);观察组视力低下发生率为40.00%,明显高于对照组(8.39%),差异有统计学意义(P<0.05).与对照组比较,观察组作业人员CRA、SPCA和ACA的PSV、EDV值均下降,CRA和ACA的RI值均升高(均P<0.05);两组人员SPCA的RI值差异无统计学意义(P>0.05).观察组作业人员视力与ACA、CRA和SPCA的PSV、EDV值均呈负相关,其中视力与PSV值的相关系数(r)分别为-0.352、-0.265、-0.304,视力与EDV值的r分别为-0.324、-0.348、-0.365;视力与RI值均呈正相关,r分别为0.363、0.326、0.344.结论 长时间操作VDT可能与其作业人员视力低下及眼部血管血流动力学参数改变有关联.

abstractsObjective To investigate the effects of long time video display terminal (VDT) operation on the ocular vascular hemodynamic and visual acuity. Methods During March and October 2015, 120 cases of video monitoring warriors were selected as study group, another 155 cases of logistics personnel as the control group. The low vision of the two groups was calculated and compared, and the color Doppler flow imaging was used to measure the central retinal artery (CRA), short posterior ciliary artery (SPCA), anterior ciliary artery (ACA),(peak systolic velocity, PSV), end diastolic velocity(EDV) and (resistance index (RI). The differences of hemodynamic parameters between these two groups were evaluated, and the relati onship between the visual acuity and each hemodynamic parameter was analyzed. Results The visual acuity of the study group was[0.8(0.4-1.2)], much lower than the control group,and the rate of low version in the study group was 40.00%,much higher than that of the control group. Compared with the control group, both of ACA and CRA of SPCA, PSV and EDV in the study group were decreased, while RI of CRA, ACA were increased (P<0.05);Compared with the control group, no statistical significance was found in the RI of SPCA in the study group (P>0.05). The PSV and EDV were negatively correlated with visual acuity(r value of PSV and visual acuity were-0.352,-0.265 and-0.304;r value of EDV and visual acuity were-0.324,-0.348 and-0.365, while RI was positively correlated with visual acuity(r value were 0.363, 0.326 and 0.344). Conclusion Our data suggest that long time video operation may be associated with changes of ocular vascular hemodynamic parameters and raise the incidence of low vision.