What type of bridge design rests entirely on the nose pads?

The keyhole bridge design is specifically crafted to rest entirely on the nose pads. This design features a notch or keyhole shape that allows the bridge to distribute weight directly onto the nose pads, which helps in stabilizing the frames and provides additional comfort for the wearer. This type of bridge is particularly beneficial for those with varying nose shapes or for those who prefer less contact across the nose.

A saddle bridge, for instance, distributes weight over a larger area across the bridge of the nose, rather than focusing solely on the nose pads. This makes it comfortable for many people, but it does not align with the specific condition of resting exclusively on the nose pads. The full-acetate bridge and plastic bridge choices are typically made from specific materials rather than defining the bridge's contact points; these types often do not emphasize pressure on the nose pads alone as the keyhole design specifically does.