A parasite that attacks the eyes are commonly single celled amoebas as well as parasitic worms.
Several different kinds of parasites can attack and even infect the eyes.
Although the specific type of parasite that attacks or infects the eyes also depends on the infection as well as how it's contracted and where in the world you're located or the region of the world as different parasites affect different regions of the world.
Common eye parasites that attack and infect the eyes include demodex mites, toxoplasma gondii, Onchocerca volvulus, Loa loa (African Eye Worm) and Acanthamoeba.
Demodex mites are tiny microscopic mites, which live in your eyelash follicles and can also cause eyelid inflammation also known as "blepharitis" when overgrown.
Toxoplasma gondii, is a protozoan parasite, which can cause ocular toxoplasmosis, which leads to inner eye inflammation and even retinal damage.
Onchocerca volvulus, is a microscopic roundworm that is spread by blackflies and causes Onchocerciasis (river blindness).
Loa loa (African Eye Worm), is a thread like parasitic worm that is transmitted by deerflies in Central and West Africa and can visibly crawl across the surface of your eye.
And Acanthamoeba is a microscopic amoeba that causes Acanthamoeba Keratitis, which is a painful corneal infection that is also often linked to contact lens use or tap water exposure.
Parasites in the eyes are killed using specific prescription medicines, specialized eye drops, or surgical removal by a doctor.
Common medical options for killing and getting rid of parasites in the eyes, include antiparasitic drugs like albendazole, ivermectin, and biguanide eye drops, depending on the exact type of organism.
Medical Treatments by Parasite Type include:
Acanthamoeba (Amoeba): Treated with topical biguanide chemical eye drops, though the cysts are very hard to destroy.
Roundworms and Eye Worms: Treated with oral anti-parasite drugs like albendazole or ivermectin, or removed live with medical tools by an eye surgeon.
Toxocariasis: Managed using steroid eye drops or anti-inflammatory drugs to stop tissue damage from the immune system.
Also never try to grab or pull at any visible worm from your eye yourself as it can cause permanent blindness and never use any home mixtures like garlic, lemon juice or even any other chemicals into your eye to get rid of parasites and instead see a doctor for proper treatment.