Abstract
Microbial keratitis is rare in the absence of predisposing risk factors. In the past trauma and ocular surface compromise (for example, bullous keratopathy, exposure, etc) were the major risks. However, with the introduction of soft contact lenses and their widespread use since the 1980s, the demographic profile of those presenting with suspected microbial keratitis has changed. Figure 1 shows the demographic change in the age groups of those presenting with suspected microbial keratitis from 1985 to 1995 at Moorfields Eye Hospital in London, United Kingdom.