Finding ochronotic sclera and ear discoloration in a 75-year-old man leads to a diagnosis of alkaptonuria

Affiliations

• ¹ Department of Ophthalmology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.
• ² Faculty of Medicine, University of Zurich, Zurich, Switzerland; Department of Ophthalmology, Augenklinik Wettingen, Wettingen, Switzerland.
• ³ Department of Ophthalmology, University Hospital Zurich, University of Zurich, Zurich, Switzerland. Electronic address: frank.blaser@usz.ch.