The most commonly seen example of a convex mirror is the side view mirror on a car. Convex mirrors are seen in dome mirrors found in offices and stores for security and anti-theft purposes.
Convex mirrors have an advantage over concave and flat mirrors in that they can provide a wider field of vision in their reflections, albeit a slightly distorted one. Convex mirrors have a curved surface that protrudes outwards. This causes light to reflect in a widespread fashion from a theoretical focal point behind the mirror. The image produced in the reflection of the mirror is referred to as a virtual image because it is smaller and farther away proportionally than the image produced by the reflection of a flat mirror. These distortions allow the mirror to provide a much larger view of the surrounding area and provide extra details that could be lost in the limited field of view provided by other types of mirrors.
The exact opposite of a convex mirror is an inverted-surface concave mirror. The image produced by the concave mirror can be either real and upside-down or virtual and magnified depending on the placement of the object in relation to the mirror's focal point.