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.
 --Dr. Matthew Theodropolous, Worcester, MA