This paper presents a review of the work which has been done on determining appropriate automotive mirror reflectivity levels for good vision as well as glare protection. In addition, its presents the results of two recent studies on the effects of glare on driver vision. In the first, the level is determined at which glare from an interior mirror degrades the driver's forward vision. Four different ambient conditions are included. The second study looks at the effect of mirror transition time on discomfort and disability due to glare. Several current mirror systems are compared to the recommended parameters.