I was performing a complete physical, including the visual acuity test. I placed the patient twenty feet from the chart and began, „Cover your right eye with your hand.“ He read the 20/20 line perfectly. „Now your left.“ Again, a flawless read. „Now both,“ I requested. There was silence. He couldn’t even read the large E on the top line. I turned and discovered that he had done exactly what I had asked; he was standing there with both his eyes covered. I was laughing too hard to finish the exam.