The term "bowing" temples refers to which of the following?

Bowing temples refers to the practice of curving the temples of a pair of eyeglasses around the head to provide a more secure and comfortable fit. When temples are designed to bow, they follow the contour of the skull, allowing the glasses to sit firmly without causing discomfort to the wearer. This design helps in keeping the eyewear in position even during movement.

This technique is particularly important for ensuring that glasses do not slip down the nose or fall off during everyday activities. The curvature also aids in distributing the pressure more evenly across the sides of the head, enhancing overall comfort during wear. Such design features are common in many eyewear styles, particularly in sports or active glasses, where stability and fit are crucial.

Other options do not align with the concept of bowing temples, as they either describe different angles or bends that do not contribute to the same level of secure fit around the head.