What is keratoconjunctivitis? Keratoconjunctivitis is a non-suppurative inflammation of the deeper layers of the corneal stroma, which may be caused by direct invasion of the corneal stroma by pathogenic microorganisms or, more commonly, by an overwhelming immune reaction between pathogenic microbial antigens and circulating bodies in the corneal stroma. The etiology of keratoconjunctival stromalitis: common causes are congenital syphilis, other causes are tuberculosis, leprosy, herpes simplex, herpes zoster, mumps, etc. Clinical manifestations of keratoconjunctivitis: 1, eye pain, photophobia, lacrimation, vision loss. 2, ciliary congestion. 3, corneal stromal infiltration, haze clouding, with neovascularization and iridocyclitis, scarring clouding and vascular traces remain after the inflammation subsides. 4, sometimes clinical signs associated with the etiology may appear, such as saddle nose of syphilis, chalazion of the corners of the mouth, etc. Treatment of keratoconjunctivitis: 1, etiological treatment, such as systemic administration of anti-tuberculosis, anti-syphilis and other drugs. 2, local application of hormones. 3, pupil dilatation, with iridocyclitis. 4, corneal transplantation, when corneal scarring significantly affects vision.