There are two possible causes of blurred eyes after playing with a cell phone for a while: The first cause is excessive time spent playing with the cell phone, which causes excessive eye use and leads to the phenomenon of accommodation spasm. Adjustment spasm will make the eyes unable to focus on relaxation when looking at the distance, but still in a state of tension, spasm, when looking at the distance will appear obvious blurred phenomenon. The second cause is low tear production due to dry eyes. If the tear production is too low, it can cause instability of the tear film on the surface of the eye, which plays a very important role in the imaging of visual quality. If the tear film is unstable, it will lead to blurring when looking at objects. Long-term use of cell phones, it is recommended to take intermittent breaks, and can also use sodium glass drops to moisten the eyes and relieve the phenomenon of dry eyes and fatigue.