Dry and tired eyes may be caused by overuse of the eyes, or it may be due to dry eye or conjunctivitis. 1. Excessive eye use: If you watch TV, cell phones and computers for a long time, it is easy to cause eye dryness and fatigue, and severe eye pain may occur, resulting in varying degrees of vision loss. 2. Dry eye: if the eyes dry and fatigue, may also be due to dry eye, which occurs due to a variety of factors caused by more tears, or anomalies, belonging to the more common ophthalmology diseases, clinical manifestations of dryness of the eyes, foreign body sensation, there may be visual fatigue, photophobia and other conditions. 3. Conjunctivitis: If you suffer from conjunctivitis, it will lead to corneal epithelial damage, eye fatigue, dryness, accompanied by foreign body sensation in the eyes, frequent blinking of the clinical manifestations. If there is dryness and fatigue of the eyes, it is recommended to take a moderate amount of rest, reasonable use of the eyes, abnormalities, timely medical treatment, and follow the doctor’s instructions for symptomatic intervention.