What are the two bridge types located on a spectacle frame?

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The correct answer identifies the two types of bridges commonly found on spectacle frames as keyhole and saddle.

The keyhole bridge is characterized by a design where the front section has a notch that provides a secure fit for the nose, allowing for better positioning and comfort. This design is particularly beneficial for people with higher nose bridges because it helps in distributing the weight of the glasses more evenly across the nose, promoting comfort during prolonged wear.

The saddle bridge design, on the other hand, features a continuous curve that rests on the nose. It tends to offer greater stability and support, making it a popular choice for many frame styles. The broader surface area in this design helps to distribute weight evenly, reducing pressure points on the nose.

These two designs serve important functional and aesthetic purposes in eyewear, enabling a comfortable and secure fit for various face shapes and sizes.

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