The doctor fixes him up with a pair of glasses and tells him to return in two weeks for a check up.
The snake comes back two weeks later. "Hows your vision since I gave you the glasses?" asks the doctor. "Great. But now I'm depressed," the snake says.
The doctor says, "Depressed? Why, didn't the glasses help you out?"
"The glasses are fine, doc. But when I got home with the new glasses I realized that Id been sleeping with a garden hose for the last two years."