The need to study the corneal complications of measles was not very obvious. Everyone knew of the (kerato) conjunctivitis of measles and considered it to be an innocuous feature of the disease. Every medical worker in developing countries knew that measles in under- or malnourished children runs a very serious course leading to, e. g., corneal The latter are seen frequently that medical workers in complications. developing countries are in the habit of speaking of post-measles blind ness. The aspect of the cornea in post-measles blindness is reminiscent of the keratomalacia in vitamine A...