Résumé
Infectious keratitis is an important problem in the Indian context, and epidemiological studies suggest a higher prevalence of disease as compared to the developed world. Various aspects of the problem, including the host defence, ocular and systemic risk factors and microbial mechanisms that enhance pathogenesis have been discussed. The clinical and microbiological approach to the infected eye and patient and the relevant tests have been outlined. The major classes of medications that are used the methods of delivery are specified. Finally, the approach to patients with non-responsive keratitis that requires surgical manoeuvres is also highlighted. Clinical experience is important in distinguishing an infective from an inflammatory corneal pathology. The role of an experienced microbiologist is inevitable, for good clinical outcome. Therapeutic keratoplasty has to be done at the right time for better clinical outcomes.