It can be difficult to identify autism or Asperger’s in adulthood, because cases tend to be mild, but the diagnosis can be life-changing for some. Signs that an adult may have Asperger’s syndrome include specific or rigid daily routines, difficulty understanding another person’s perspective or emotions, a preference to avoid eye contact, strong reactions to specific sights, sounds, or textures, and passion for a specific topic such as puzzles or a TV show character.