Luminance has the strongest influence on pupil size, near fixation has hardly any influence down to 1 m. The well-known age relation of pupil size in darkness is also valid for mesopic and photopic conditions. At 3 cd/m2 it was the same as reported in darkness, at 30 cd/m2 it was less in absolute numbers, but relative as compared to young adults it was approximately the same.

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A case of listeriosis in a patient undergoing long-term hemodialysis is reported. The 69-year-old man with chronic renal failure due to polycystic renal dysplasia had received hemodialysis treatment for 10 years. Renal anemia and iron overload developed within this time. In the course of a hemodialysis the patient presented with malaise, chills and fever to 38.7 degrees C. Blood culture specimens were obtained and the patient received ampicillin-sulbactam. Blood culture specimens subsequently showed growth of Listeria monocytogenes. During therapy the patient improved rapidly and was free from fever on day 5. The relation of iron overload and Listeria infection is discussed.

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