A 1-year-old baby came to our hospital because his parents found a “worm” in his eye. He has a pet dog at home. On examination, several thin, white, 1-50 px long worms were seen in the conjunctival sac of the left eye, crawling outward from the inner canthus. The conjunctiva was congested, the cornea was transparent, the anterior chamber was medium to deep, the pupil was round, and the reflex to light was present. No abnormality was seen in the conjunctival sac of the right eye. The conjunctival sac was rinsed with 0.9% sodium chloride daily and topical antibiotic ophthalmic solution tobramycin was administered. Pathological examination: echinococcosis Echinococcosis, also known as worm disease, is a very dangerous human-animal parasitic disease caused by the larval echinococcosis of several species of echinococcosis cestodes parasitized in the organs of cattle, sheep, humans and other mammals. It is mainly found in cattle and sheep grazing in grasslands. The eggs are eaten by humans and then hatch in the duodenum into six hookworms that pass through the intestinal wall into the portal vein and are then carried to the liver and lungs, forming an encysted worm. Infection of the eye is rare, but the formation of orbital and ocular muscle conidiopathy and anterior chamber has been reported. The larvae of Echinococcus larvae were seen in the conjunctival sac of this child, which may be related to a history of exposure to domestic dogs and the development of eggs in the conjunctival sac from exposure to the feces of domestic dogs. Therefore, staying away from pets is an effective preventive measure, and the hygiene of young children should be enhanced, and preventing domestic dogs from consuming animal offal is an important preventive measure.