This disclosure relates to an improved exterior adjustable rearview mirror for motor vehicles, with air flow apertures designed and arranged for the removal of moisture, dust, debris and the like from the viewing surface of a rearview mirror mounted therein. The exterior adjustable rearview mirror attached to the front side window, in a manner known per se, consists of a fixed rigid rearview mirror housing with a rearwardly opening providing visibility to an adjustable rearview mirror therein. An air intake aperture is formed on the forwardly directed wall of the rearview mirror housing structure, with respect to the direction of travel of the motor vehicle. The air intake aperture serves to direct the flow of air through a vertical air compression chamber within the rearview mirror housing structure. Hence, the flow of air travels out through the air exhaust aperture located above the viewing surface of the rearview mirror. The flow of air exiting the air exhaust aperture applies a force on the viewing surface of the rearview mirror in such a manner whereby moisture, dust, debris, and the like is forced in a vertical direction off the viewing surface of the mirror, as the motor vehicle with the attached exterior adjustable rearview mirror travel in a forward direction. In addition, the design of the air compression chamber together with the moisture sump depression and the moisture weep duct will remove airborne moisture which may be captured within the device. This moisture is removed and is not distributed onto the viewing surface of the rearview mirror.

A combination curved and flat mirror lens has a comparatively flatter top portion and a substantially convex or curved lower portion integrally formed to the top portion. The lens has a maximum radius of curvature at one end thereof continuously varying to a minimum radius of curvature at an opposite end. A method for forming such a mirror lens includes cutting such a lens out of a large sheet of curved mirror glass.

A vehicle mirror, and a mold for making same, each includes a portion of the viewing surface wherein the field angle increases at an increasing rate as the observer's eye travels outward across the mirror, and another portion wherein the field angle increases at a decreasing rate as the observer's eye travels across the mirror surface. In one embodiment, the mirror includes a primary viewing area (16) nearest to the observer (14) having a spherical convex surface, a secondary viewing area (18) somewhat farther from the observer, having an aspherical convex surface wherein the field angle increases at an increasing rate, and a tertiary viewing area (20) still farther outward, having an aspherical convex curvature wherein the field angle increases at a decreasing rate.

An air scoop for use in conjunction with an external mirror on a vehicle for eliminating water droplets on the reflecting surface of the mirror by funneling a flow of air over the top of the mirror and down over the face thereof. The air scoop includes a top plate mounted above the top of the mirror, and a downwardly curving deflector formed at the rearward edge of the top plate to direct the flow of air over the surface of the mirror when the vehicle is in forward motion. The air blows the water spray off of the mirror for improved visibility.

An asymmetrical mirror lens, usable on front fenders of school buses and similar vehicles, which has a plurality of mirror sections, each having a distinct constant radius of curvature to reduce image distortion. Optional sections located between sections of the constant radius of curvature have a step-wise changing radii of curvature to smooth the image sizes as an object moves across the mirror lens.