At this price, the MDX goggles from Dragon might seem expensive, but for that money they come with both a Blue Steel mirrored lens and a clear one. Both lenses sport lugs for tear-offs.
The Blue Steel lens does substantially darken the view, and is only worth using on really bright days when the sun is truly blazing. The anti-fog treatment works pretty well, and the clear lens was surprisingly resistant to scratches.
The Dragon MDX goggles are very comfortable, and they fitted well into every helmet that we tried them with.