The answers given did not take into account the duration and severity of the eye twitching and other symptoms that may accompany it. If eye twitching is occuring 24/7 for more than a few weeks, and other symptoms accompany it, it is not normal, as was suggest that eye twitching in normal.
Twitching is one of the many possible symptoms of HIV (Human Immunodeficiency Virus) or AIDS (Acquired Immunodeficiency Syndrome), and may occur at any stage of infection with HIV or the development of AIDS. AIDS is defined by the Center for Disease Control and Prevention as the condition occurring when a person infected with HIV has a T cell count of 200 or less or one of several serious conditions, such as pneumonia, tuberculosis or certain types of cancer.