Excessive Internet use should be defined not by the number of hours spent online but "in terms of losses," said Maressa Hecht Orzack, a Harvard University professor and director of Computer Addiction Services at McLean Hospital in Belmont, Mass., founded in 1995. "If it is a loss [where] you are not getting to work, and family relationships are breaking down as a result around it and this is something you can't handle, then it's too much." The Web site for Orzack's center lists the following among the psychological symptoms of computer addiction: Having a sense of well-being or euphoria while at the computer; Craving more and more time at the computer; Neglect of family and friends; Feeling empty, depressed or irritable when not at the computer; Lying to employers and family about activities; Inability to stop the activity; Problems with school or job. Physical symptoms listed include dry eyes, carpal tunnel syndrome, migraines, backaches, skipping meals, poor personal hygiene and sleep disturbances. (Full story here)