Unusual case of interstitial keratitis.

THE clinical features of interstitial keratitis-a fast disappearing diseaseare well known and so definite as to enable not only ophthalmologists but clinicians in general to arrive at a correct topographical if not aetiological diagnosis. That there are atypical forms of almost all diseases is indisputable and the following case report appears justifiable because of its close mimicry of Mooren's ulcer, and its defiance of all forms of treatment including an annular lamellar keratoplasty.