Under normal circumstances, mites can be found in the eyes of ordinary people, but when the number of mites parasitized in the eyes is large, clinical manifestations such as red itching, dryness and foreign body sensation in the eyes may occur. When the number of mites parasitized on the eyelid margin and eyelashes exceeds the tolerable range of the human eye, due to the activity of the mites and the dysfunction of the human immune system, red itching, dryness, foreign body sensation, burning sensation, and eye fatigue and other clinical manifestations may occur in the eye. For the examination of mite parasites in the eye mainly take eyelid margin eyelash plucking, and microscope to find a larger number of mites as the basis of the method, in the search for mites can be taken under the guidance of the doctor targeted mite repellent treatment, in a certain course of treatment after the corresponding clinical signs and symptoms can be relieved.