Study on visual fatigue and visual function under changing ambient light color temperature by natural color mode: The influence of electronic display devices on visual fatigue of human eyes is the main evaluation index and the main outcome index of this experiment. Secondary outcome indicators were visual function indicators such as regulation and aggregation. There are other outcome measures: effective reading efficiency, blink detection, retinal fundus blood flow. The baseline values of the above indicators were respectively measured, and then the specific values of different indicators when the natural color mode was enabled and not enabled were collected under the changing ambient light color temperature, and the baseline values were statistically compared and analyzed. Evaluate the effect of natural color patterns on the relief of visual fatigue and on visual function.