As a rear-view mirror in cars, convex mirrors are preferred due to their ability to provide a wider field of view, allowing drivers to see more of the traffic behind them. Convex mirrors achieve this by curving outward, which reflects a larger area compared to flat mirrors.

The unique curvature of convex mirrors also results in a specific optical characteristic: they create simulated, upright, and diminished images of objects positioned in front of them. This optical effect is beneficial for enhancing visibility and perception while driving, particularly in monitoring rear traffic and blind spots.

The design of convex mirrors contributes to improved safety on the road by enabling drivers to have a clearer and more comprehensive view of their surroundings. This is why convex mirrors are commonly used as rear-view mirrors in various vehicles, enhancing driver awareness and overall road safety.