title: [Effects of video work on the ocular vascular hemodynamic and visual of the operators].
abstract: Objective: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 relationship 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 (rvalue of PSV and visual acuity were -0.352, -0.265 and -0.304;rvalue of EDV and visual acuity were -0.324, -0.348 and -0.365, while RI was positively correlated with visual acuity (rvalue 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.
authors.affiliation: Department of Ultrasound, the Guangxi Zhuang Autonomous Region Institute of Occupational Disease Prevention and Control, Nanning 530021, China.
authors.forename: J P
authors.initials: JP
authors.lastname: Yang
authors.forename: L P
authors.initials: LP
authors.lastname: Zhu
authors.forename: Z L
authors.initials: ZL
authors.lastname: Zhang
authors.forename: X Y
authors.initials: XY
authors.lastname: Huang
mesh_terms: D001783:Blood Flow Velocity; D016022:Case-Control Studies; D019842:Ciliary Arteries / Q000000981:diagnostic imaging*; D006439:Hemodynamics / Q000502:physiology*; D006801:Humans; D009880:Ophthalmic Artery / Q000000981:diagnostic imaging*; D012161:Retinal Artery / Q000000981:diagnostic imaging*; D018615:Ultrasonography, Doppler, Color / Q000379:methods*
keywords: Computer terminals; Hemodynamics; Ocular vessel; Vision