[Influence of long-time video operation on hemodynamics of the retrobulbar arteries in operators].

Objective: To investigate the influence of long-time video operation on hemodynamics of the retrobulbar arteries in operators. Methods: From March to October, 2015, a total of 120 soldiers for office work engaged in video surveillance were enrolled as study group, and 155 fire fighters were enrolled as control group. The incidence of eye discomfort was compared between the two groups. Color Doppler ultrasound was used to measure and compare the peak systolic velocity (PSV) , end-diastolic velocity (EDV) , and resistance index (RI) of the central retinal artery (CRA) and the short posterior ciliary artery (SPCA) , and the correlation of video operation time with the hemodynamic parameters of the retrobulbar arteries was analyzed. Results: The study group had a significantly higher incidence rate of eye discomfort than the control group ( P <0.05) . Compared with the control group, the study group had significant reductions in the PSV and EDV of the CRA and the SPCA and a significant increase in the RI of the CRA ( P <0.05) . Video operation time was negatively correlated with the PSV and EDV of the CRA and the SPCA ( r =-0.61, -0.54, -0.65, and-0.68, all P <0.05) and positively correlated with the RI of the CRA and the SPCA ( r =0.56 and 0.63, P <0.05) . Conclusion: Long-time video operation can increase the incidence of eye discomfort and lead to increased blood resistance of the CRA and the SPCA and reduced retinal perfusion.