The Quadraspheric Lens

Why its Best

There are a few styles of Crossview mirrors used in the transportation industry today.
The two most common are the Oval-Elliptical and the Quadraspheric.

Basic Cross View Mirror Styles

Oval-Elliptical	Elongated Oval Elliptical	Quadraspheric

The first thing you'll notice when comparing these styles is the quadraspheric design significantly reduces the visual distortion seen in the other styles of convex mirrors. But a potentially worse problem with the oval and round convex lenses (in exterior applications) is that they tend to introduce too much of the sky and requently with it, glare from the sun. When the sun is low in the sky, this can even happen when an oval mirror is properly rotated all the way down (as in fig.1).