Keratitis

Keratitis is a condition in which the eye's cornea, the front part of the eye, becomes inflamed. The condition is often marked by moderate to intense pain and usually involves any of the following symptoms: pain, impaired eyesight, photophobia, red eye and a 'gritty' sensation.

Keratitis can be caused by infective viral(Herpes simplex keratitis,Herpes zoster keratitis), bacterial(bacterial infection of the cornea can follow from an injury or from wearing contact lenses), fungal(fungal keratitis), amoebic(amoebic infection of the cornea is a serious corneal infection, often affecting contact lens wearers.) and parasitic(onchocercal keratitis).