Mental Patient Joke

The psychiatrist moves close to the young man in the hospital room. He is staring straight ahead oblivious to his surroundings. Suddenly he starts yelling, "I can't see! I can't see!"

Taken aback, the psychiatrist turns to the boy's mother who is sitting nearby, "How long has this been going on?"

"Ever since you stepped in front of the TV." is the lackadaisical response.