The 61-year-old woman put on her reading glasses to try to decipher the tiny black squiggles on the back of the package of instant pudding. Was it two cups of milk? Or three? The glasses didn’t seem to help. The fuzzy, faded marks refused to become letters. The right side of her head throbbed — as it had for weeks. The constant aggravation of the headache made everything harder, and it certainly wasn’t helping her read this label. She rubbed her forehead, then brought her hand down to cover her right eye. The box disappeared into darkness. She could see only the upper-left corner of the instructions. Everything else was black. She quickly moved her hand to cover her left eye. The tiny letters sprang into focus.
She moved back to the right: blackness. Over to the left: light and letters. That scared her. For the past few months, she’d had one of the worst headaches she had ever experienced in her lifetime of headaches. One that wouldn’t go away no matter how much ibuprofen she took. One that persisted through all the different medications she was given for her migraines. Was this terrible headache now affecting her vision? The