Are the Small Round Mirrors on Car Rearview Mirrors Useful?

[OGarrett]

Small round mirrors on car rearview mirrors are useful as they can reduce the driver's blind spots. The original rearview mirrors alone cannot provide a complete view of the surroundings, but with these small round mirrors, drivers can gain a broader perspective of their environment. Rearview Mirror Adjustment Methods: Adjusting the Center Rearview Mirror: For left and right positioning, adjust until the left edge of the mirror just cuts off the right ear of your reflection. Under normal driving conditions, you should not see yourself in the center rearview mirror. For up and down positioning, place the distant horizon at the center of the mirror. The far horizon should be aligned with the midline of the center rearview mirror, and then adjust left and right until the image of your right ear appears at the left edge of the mirror. Adjusting the Left Rearview Mirror: For up and down positioning, place the distant horizon at the center. For left and right positioning, adjust until the car body occupies 1/4 of the mirror's surface. Key adjustment points for the left rearview mirror: Align the horizon with the midline of the mirror, then adjust the car's edge to occupy 1/4 of the mirror's image. Adjusting the Right Rearview Mirror: Since the driver's seat is on the left side, it's harder to monitor the right side of the car. Additionally, for roadside parking needs, the right rearview mirror should show more ground area, occupying about 2/3 of the mirror's surface when adjusting up and down. For left and right positioning, adjust until the car body occupies 1/4 of the mirror's surface. Key adjustment points for the right rearview mirror: Place the horizon at the 2/3 position of the mirror, then adjust the car's edge to occupy 1/4 of the mirror's image.