The diagnosis is made by an ophthalmologist/optometrist correlating typical history, symptoms and signs. Many times it may be missed and misdiagnosed as bacterial ulcer. A definitive diagnosis is established only after a positive culture report (lactophenol cotton blue, calcoflour medium), typically taking a week, from the corneal scraping. Recent advances have been made in PCR ref 3./immunologic tests which can give a much quicker result. Classification Infectious keratitis can be bacterial,<unk> , viral, or protozoal. Remarkable differences in presentation of the patient allows presumptive diagnosis by the eye care professional, helping in institution of appropriate anti-infective therapy.
Fungal keratitis
Nummular keratitis
Neurotrophic keratitis
Herpes simplex keratitis
Interstitial keratitis
Peripheral ulcerative keratitis
Diffuse lamellar keratitis
Acanthamoeba keratitis