Eyes blurred by heat may be caused by eye fatigue, conjunctivitis, dry eye and other reasons. 1. Eye fatigue: due to staying up late, poor sleep quality, excessive eye stimulation and other bad habits, triggering ciliary muscle spasms, resulting in eye regulation dysfunction, so that the function of the oil secretion of the blepharoplastid glands is reduced, resulting in the symptom of blurring of the eyes in the presence of heat. 2. Conjunctivitis: after the eyes are exposed to heat, there may be conjunctival inflammation, there will be some inflammatory secretions, these inflammatory secretions stick to the cornea, it is easy to appear the phenomenon of blurred eyes when exposed to heat. 3. Dry eye: In the hot environment, the eyes will have increased secretions, which will lead to the symptoms of blurred eyes. You should pay attention to eye hygiene and avoid eye fatigue. The symptoms of heat blurring of the eyes, rest can not be relieved, go to the regular hospital in a timely manner to find out the cause of the disease, follow the doctor’s instructions for targeted treatment.