Black eye the cornea is the clear transparent normal, if the eye to a camera, the cornea is like a camera lens. When corneal infection by germs or trauma, clear transparent cornea becomes cloudy, affecting the clarity of vision, that is, the saying goes \"eyes Mongolia\", as if through a gas of glass objects, like frosty.
Corneal haze after inflammatory scar formation after the repair process for corneal Nebula, it is a sign of keratitis of healing, mostly permanent, not easy to fade. Corneal Nebula thick-varies based on violation of shades and morphology of corneal, divided into Nebula cloud Nebula, spot and white spots three. Nebula violations of corneal tissue in shallow, thin scar, especially by the clouds in the sky, only by special checks have found; white spot violations of all layers of the cornea, scar, and porcelain white, is able to find with the naked eye; spot Nebula between cloudiness and white spot between the two.
Pannus formation effects in varying degrees of vision, closely related to the type of pannus and parts. In corneal Nebula surrounding Nebula or spot, such as limiting the scope, general effect on vision or are not affected; located in the central cornea, pupil of the site, even if the Nebula is a Nebula or spot, also affect the vision. Therefore, after corneal damage, especially corneal lesions of the central authorities, must actively treatment to deep corneal development to halt the disease, corneal scar the formation of more thin as possible, so as not to affect vision.
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