A slide lever on the bridge of the eyeglasses pushes the fluid forward or backward to alter the shape of that membrane, changing the focal distance depending on what the user is doing.

That's actually optional; the bridge doesn't need to have its own IP address, since it will transparently forward packets from one interface to the other.

According to the detection and evaluation results of reinforcement engineering of gateway bridge in Dongwan city, this paper puts forward pertinence reinforcement design and measures.