What type of frame mounting holds the lenses in place without using eyewires or nylon cords?

Rimless mounting is a type of frame design where the lenses are attached directly to the temples and bridge without the encasing of standard eyewires. This method allows for a lightweight and minimalist appearance, emphasizing the lenses themselves rather than the frame.

Semi-rimless mounting, while having a portion of the lens held by a top eyewire, also typically utilizes a nylon cord or similar method to secure the bottom of the lens. Thus, it does not meet the criteria specified in the question.

Numont mounting is similar to rimless mounting as it often employs small metal fittings to hold the lenses in place without the traditional eyewires. However, it is a distinct style that may incorporate specific aesthetic elements.

The question asks about a style that categorically holds lenses without using either eyewires or nylon cords. Rimless and Numont mountings fit this description, while semi-rimless does not. Therefore, the singular answer would be rimless or Numont, rather than an inclusive selection of all options.

Thus, the correct answer does not encompass all mentioned types but rather specifically highlights the frame mounting that holds lenses without using eyewires or cords—specifically, rimless or Numont.