This haze can affect adolescents negatively by affecting their ability to think, react, learn, and regulate their emotions during the day. One metaphor for example is that you don't know how bad your vision is until you try on a pair of glasses or, in this case, sleep. Some examples of sleep deprivation would be not being able to function in class, falling asleep within five minutes of going to bed, or falling asleep right after returning from school. A sophomore at a New York City high school wandered into the kitchen for a late-night snack at 3 a.m. After several nights of sleeping 3-4 hours straight due to working on a dissertation, he ended up cutting his thumb with a knife, forcing him to go to the hospital and undergo two thumb surgeries. (Garey1) Later school start times can help adolescents rebuild their quality of life.