When you say that there is curvature, it is technically called lens angle or curved surface bending angle. It is the included angle (acute angle) between two lenses, and the mirror angle is generally a few degrees to a dozen degrees, and the mirror angle of sports glasses will be larger.

Generally, glasses do not consider this angle, although the size of the mirror angle does affect the wearing effect. When designing personalized lenses, this angle will be considered as one of several personalized parameters in order to achieve the best effect. See Personalized You, Personalized Lens in my library for details.