What type of bridge is commonly found on plastic frames and is suitable for individuals with a short nose?

The keyhole bridge is a design specifically tailored to enhance comfort and fit for individuals with shorter noses. This bridge features a central cut-out resembling a keyhole, which allows the frames to rest comfortably on the nose without applying excess pressure. The shape helps in distributing the weight of the glasses more evenly, which can be advantageous for those who might find traditional bridge designs less accommodating.

On the other hand, the saddle bridge, while stable, may not provide the necessary clearance and comfort for individuals with shorter noses, risking discomfort or improper fit. The comfort bridge is also designed to offer ease, but it does not have the unique shape that specifically aids those with short noses as effectively as the keyhole design does. The strap bridge, generally associated with more sporty or avant-garde frame styles, does not directly address the fit for individuals with shorter noses in the same way as the keyhole. Thus, the choice of a keyhole bridge represents the best option for a comfortable and secure fit in this scenario.