From an article I read, it states that A BAL of .055 can reduce the field of vision by THIRTY PERCENT (30%).
It also states that a reduction of a field of vision makes it more difficult to see potential hazards from either side.
BAL stands for Blood Alcohol Level. It is defined as the ratio of the alcohol to blood in the body. BAL is usually calculated as a percentage. The legal limit of BAL when driving intoxicated is 0.08% in most states, when you are driving beyond the legal limit you will be imprisoned because you represent a hazard not only to yourself but also to other vehicles and pedestrians.