COVER: Modified Ziehl-Neelsen (left) and acridine orange (right) stains of corneal biopsy material showing presence of Nocardia species, and unusual cause of microbial keratitis in a patient with ocular cicatricial pemphigoid. By courtesy of Mr John McCormick, ophthalmic photographer, Tennent Institute of Ophthalmology. (From paper by Bennett et al, this issue, pp137-45.)