* '''Cyclosporin''' 2% is an ocular immunomodulator, which can produce excellent results but only in about 50% of cases. It can be used to replace corticosteroids if corneal ulceration is present. A ten-day course given at twelve-hourly intervals is recommended | * '''Cyclosporin''' 2% is an ocular immunomodulator, which can produce excellent results but only in about 50% of cases. It can be used to replace corticosteroids if corneal ulceration is present. A ten-day course given at twelve-hourly intervals is recommended |