Which frame construction is considered the least desirable for children?

Nylon cord frame construction is often considered the least desirable for children due to its inherent flexibility and tendency to lack durability compared to other materials. While nylon cord frames can be lightweight and comfortable, they may not withstand the rough handling that can be typical for children. This can result in frames that may stretch or lose their shape over time, which is particularly problematic for young wearers whose vision requirements may necessitate a more stable fit.

In contrast, deeply grooved frame fronts may provide better retention of lenses, and bridges that offer support in the lower part of the nosepad can enhance comfort and fit. Spring temples, on the other hand, allow for better adjustment and fit, which is beneficial for active children who may take off and put on their glasses frequently. Thus, while all frame options have their applications, nylon cord construction is less favorable in a children's eyewear context due to its potential for inadequate stability and durability.