A worm in the eye is usually a parasitic infection of the eye. There are many different types of parasitic infections of the eye, such as conjunctival fly maggot disease and toxoplasmosis. Parasitic diseases of the eye are less likely to occur than other infectious diseases, but when they do, they can seriously affect the health of the eye. A common parasitic disease of the surface area of the eye is conjunctival fly maggot disease, which is caused by fly eggs that enter the conjunctival sac and hatch to form fly maggots, and needs to be treated by cleansing the conjunctival sac and removing the worms. Toxoplasmosis, a common parasitic disease of the eye, causes chronic inflammation of the eyeball, which can jeopardize the health of the retina and cause vision loss, and usually requires vitrectomy surgery. In addition, there are other types of parasitic infections in the eye, and it is important to consult a doctor in time to confirm the diagnosis of parasitic infections in the eye, and to follow the doctor’s instructions for treatment, rather than “treatment” on their own.