In Numont mounting, how are the lenses connected to the frame?

In Numont mounting, lenses are connected to the frame near the edge, which is a defining characteristic of this specific mounting style. This technique is commonly used in rimless frames, where the lenses are secured by small screws or clips that are situated close to the lens edges. This method ensures that the lenses are held firmly while providing a minimalistic and unobtrusive look. Since the mounting does not involve a full eyewire that encircles the lens, it allows for a sleek and lightweight frame design, which is particularly appealing for many wearers.

The other options describe different mounting or securing methods. Using eyewires typically refers to a full-rim frame style, where the entire lens is encased within a frame. Connecting lenses at the bridge only does not provide adequate support or security for the lenses, as it would not stabilize the lens's position properly. Lastly, using a metal arm only suggests a different kind of frame where the lenses may be attached by a temple that does not provide proper stabilization to the lens, preventing the aesthetic and structural integrity that Numont mounting aims to achieve.