An Optimal Visual Fatigue Relief Method for Workers Considering Rest Time Allocation

Working under the visual display terminal for several hours may lead to serious visual fatigue. Productivity will be reduced and the health of workers will be damaged. To address the problem, an optimal visual fatigue relief method for workers considering rest time allocation has been proposed in this paper. First, an analytic model is established to depict the relationship between the visual fatigue change and continuous work time. On this basis, according to optimization theory, aiming at minimizing the total visual fatigue level during work, an optimization model of hourly rest time allocation is developed considering working demands. This model is converted as a classic mixed-integer linear programming (MILP) problem and efficiently solved by Gurobi. Finally, a validation experiment with 20 participators is done to verify the effectiveness and superiority of the proposed strategy. The results show that the proposed analytic model could effectively evaluate the visual fatigue development, and the proposed rest time optimization strategy could significantly reduce the visual fatigue level and improve the visual health.