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Onchocerciasis, also known as river blindness, is a disease caused by infection with the parasitic worm Onchocerca volvulus. [1] Symptoms include severe itching, bumps under the skin, and blindness. [1] It is the second-most common cause of blindness due to infection, after trachoma. [6]
The infection causes a roughening of the inner surface of the eyelids. [2] This roughening can lead to pain in the eyes, breakdown of the outer surface or cornea of the eyes, and eventual blindness. [2] Untreated, repeated trachoma infections can result in a form of permanent blindness when the eyelids turn inward. [2]
Onchocerca volvulus is a filarial (arthropod-borne) nematode (roundworm) that causes onchocerciasis (river blindness), and is the second-leading cause of blindness due to infection worldwide after trachoma. It is one of the 20 neglected tropical diseases listed by the World Health Organization, with elimination from certain countries expected ...
According to the CDC, people should seek medical care if they have symptoms of an eye infection, including: Yellow, green or clear discharge from the eye. Eye pain or discomfort.
Fungal keratitis is a fungal infection of the cornea, which can lead to blindness. [2] It generally presents with a red, painful eye and blurred vision. [1] There is also increased sensitivity to light, and excessive tears or discharge.
There are many diseases known to cause ocular or visual changes. Diabetes , for example, is the leading cause of new cases of blindness in those aged 20–74, with ocular manifestations such as diabetic retinopathy and macular edema affecting up to 80% of those who have had the disease for 15 years or more.
The symptoms classically attributed to AK include decreased or blurred vision, sensitivity to light (photophobia), redness of the eye (conjunctival hyperemia), and pain out of proportion to physical exam findings. [15] [7] Another clinical feature that can distinguish Acanthamoeba from bacterial causes of keratitis is a lack of discharge from ...
A bacterial infection can result in a mucus and pus secretion. [1] Severe cases of ophthalmia can cause blindness if not treated, especially in newborns, who contract it from the environment in the womb. [2] Treatments vary according to the nature of the cause, with minor irritations going away on their own.