Toyota has extended warranty for certain models for this same problem, but not for Prius. My car has 117,000 miles and this problem has been going on for at least the last 25,000 miles (based upon orange warning triangle). According to dealer, problem is with rings (which is the recall for other Toyota cars). Also, according to dealer, this is a real problem for other Prius owners with 100,000+ miles.
Concave lenses in glasses correct this shortfall by spreading out the light before it reaches the eye, thereby enabling the person using them to see distant objects more clearly. Cameras. Camera manufacturers use combinations of concave and convex lenses to improve the quality of photographs.
The term concave is a term that defines the boundness of a curve or some geometric shape on a coordinate plane, now there is 2 types of concavity there is concave up or concave down, if its concave up it is bounded below and if it is concave down it is bounded above, howevere to answer your question no there is no such thing, however a trapezoid on ...