Ocular parasites are most commonly known as larvae and cysticerci, and the route of infection is mainly due to the parasite entering and parasitizing the human eye, severely damaging the eye tissue and impairing the function of the visual apparatus. The presence or absence of parasites in human eyes is generally judged by the route of infection, clinical manifestations and auxiliary examinations. If a patient washes his face with water contaminated with parasite eggs, or rubs his eyes with fingers contaminated with parasite eggs, or splashes droplets with parasite eggs into his eyes, he may be infected with parasites; 2. If there is a large number of louse-like parasites and eggs attached to the lower eyelid margin of the eye and the roots of the eyelashes, it means that there are parasites in the eye. For patients with parasitic eye infections, the main treatment is to surgically remove the parasites and give anti-inflammatory eye drops to prevent infection. The best way to prevent eye parasites is to pay attention to daily life and dietary hygiene to prevent the eyes from being infected by parasites.