In mounting a lens in a nylon suspension type frame, what process must be used?

In the context of mounting a lens in a nylon suspension type frame, using a groove is the correct process. A nylon suspension frame typically involves lenses that are held in position by a nylon cord or similar material. The groove is a designed channel around the lens edge that allows for secure seating of the lens within the frame.

When the lens is properly grooved, it fits snugly into the frame, ensuring stability and reducing the likelihood of the lens coming loose or falling out. This is essential for both the comfort of the wearer and the integrity of the eyewear. In frames designed for nylon suspension, the groove allows the nylon cord to create tension around the lens, effectively suspending it in place.

The other methods, such as drilling, notching, or using a V-bevel, are not suitable for this type of frame. Drilling entails creating holes that would not be compatible with the structure of a nylon suspension frame. Notching and V-beveling do not provide the necessary secure fit that a groove offers, which is crucial for maintaining the alignment and the optical performance of the lenses in this frame type.