Acanthamoeba Infection Is At Risk Of Blindness Due To Wearing Contact Lenses

Currently contact lenses are loved by young people. The main purpose of contact lenses is to correct refractive errors. The advantage is that it is possible to move along the iris of the eye, reducing the feeling of blurring caused by surrounding factors, such as when out in the sun or in the rain. In addition, because it is brought close to the eyes, without the support, it is suitable for some movement jobs like athletes, or jobs that require looks like actors, singers, models. If not cleaned, the risk of infection with Parasites can cause blindness

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There are many types of contact lenses that not only serve the needs of correcting refractive errors but also beauty needs. Some contact lenses help change the color of the eyes, others make the eyes appear bigger and more glitter.
Why wear contact lenses infected with Acanthamoeba parasite?
The cornea is a thin layer of transparent tissue on the outermost side of the eye The cornea helps focus light to help the eyes see When the contact lens is inserted into the eye, there will be a thin layer of water separating the cornea surface and the contact lens, so that the contact lens can follow the movement of the eye. Contact lenses are in direct contact with the cornea, so if not thoroughly cleaned, they can easily carry germs into the eyes, causing eye infections.



. In addition, when worn improperly can scratch the cornea, thereby creating favorable conditions for bacteria, viruses and parasites to enter the eye, including Acanthamoeba. Acanthamoeba infection, also known as corneal amoeba infection, is a common causative agent of keratitis in contact lens patients. Many cases of contact lens patients have been infected with the Acanthamoeba parasite, for example, a 20-year-old female T. in Dak Lak suffered severe corneal ulceration due to Acanthamoeba infection.
Where does Acanthamoeba infection of the eye cause originate?
Acanthamoeba is a unicellular, free-living organism in the environment Acanthamoeba is present everywhere in our habitat, including in soil and vegetables, in both fresh, brackish and salt water, such as in field water, sewage, pool water , tap water, contact lens soaked water, cooling system, heating system, they even survive in dialysis machines, herbal water and dental clinics! Therefore, humans are easily exposed and infect this parasite.
Acanthamoeba parasites that cause disease in humans are A. byersi, A. castellanii, A.



. culbertsoni, A. hatchetti, A. healyi, A. astroonyxix, A divionensis and A. polyphaga. B. mandrillaris. In addition to causing keratitis, Acanthamoeba also causes skin damage, especially in immunocompromised people.
The development cycle of the Acanthamoeba Parasite
The Acanthamoeba parasite has two life cycles: cyst and trophic body.



. The eutrophic body doubles by mitotic mitosis. The trophic form is the main infectious form, but both the trophic form and the cystic form can enter the body in various ways: through the eyes, through the nose to the lower respiratory tract, through the abrasive skin erosions, ulcers.
When penetrated into the eyes, Acanthamoeba can cause severe keratitis in patients using contact lenses with normal immune system. In fact, people who do not wear contact lenses are also at risk of this parasite, but people who wear glasses are 7 times higher risk. Under normal conditions, parasites have difficulty clinging to the cornea to cause disease, but when contact lenses are used as a fulcrum, they are easier to attach to the cornea. Keratitis is a dangerous disease, which can lead to blindness. If Acanthamoeba penetrates through the respiratory tract or through the skin, it can attack the central nervous system causing amoeba encephalitis, systemic pathology or skin damage in immunocompromised patients.
Manifestations of parasitic infection due to contact lens wear
Acanthamoeba keratitis is usually localized in one eye, and the symptoms vary from person to person. Acanthamoeba keratitis is eye pain, redness after removing the glasses from the eye.



Blurred vision, fear of light, watery eyes, or a stinging in the eyes are also common symptoms. If any of the above symptoms must be immediately examined. Typical infiltrates are circular infiltrates. If left untreated, corneal ulceration and corneal scarring can become serious and can cause permanent blindness.
Diagnosis of infection with Acanthamoeba parasite due to wearing contact lenses
Diagnosed by finding cysts and trophic bodies under a microscope. Recently, people also use Real-time PCR to diagnose Acanthamoeba.
Preventing parasite infection by wearing contact lenses
If it is necessary to use contact lenses, we must know how to prevent the transmission of Acanthamoeba. Hygiene must be maintained during storage and when wearing glasses, clean hands before wearing glasses Glass must be washed with glass washing solution as soon as it is removed. Never expose contact lenses to plain water, soak contact lenses in a disinfectant solution every day.



. Do not use unsanitary water to wash your face. Limit contact lens glue when swimming, steaming or bathing. Should remove the glass before.

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