A blind spot is an area or condition that a person is unable to see, detect, or be aware of, even though it is right in front of them. It can refer to physical areas where a person's vision is obstructed, such as when driving a car and not being able to see the rear-view mirror. However, the phrase "blind spot" is also often used metaphorically to describe an area or aspect of something that is overlooked or ignored, despite its importance. For example, someone might have a blind spot in their thinking when it comes to a particular issue, meaning they are unable to see the problem or its consequences clearly.