Best material for rimlesses prescription eyeglasses!

[cheap glasses]

Frameless eyeglasses nowadays are really popular and stylish, they can show face shape perfectly without hiding anything, but I find it is really tough to find the right frame material for such eye wears, as the lenses have no longer the protection from a full frame provided by full-frame eyeglasses, and the lenses sometimes can be bent up by some pressure, and they only use some screws to connect the lenses with the temples and the bridge, so, which frame material is the best for such eyeglasses, and it should feature the durability and strength?