A woman rushed to see her doctor, looking very much worried and all strung out. She rattles off: "Doctor, take a look at me. When I woke up this morning, I looked at myself in the mirror and saw my hair all wiry and frazzled up, my skin was all wrinkled and pasty, my eyes were bloodshot and bugging out, and I had this corpse-like look on my face! What's WRONG with me, Doctor!?"

The doctor looks her over for a couple of minutes, then calmly says: "Well, there's at least one problem that we can rule out; your eyesight."