A power supply may include a driving power supply unit converting input power to supply driving power to a load, and a power supply control unit performing a control to detect a change in a voltage level of the driving power and cut off the input power when the detected voltage level of the driving power is equal to or more than a preset voltage level, in a preset standby mode. In one embodiment, the solution is administered intraocularly after cataract surgery before insertion of a replacement intraocular lens, resulting in reduced posterior capsular opacification which may eliminate the need for a subsequent surgery. The computer system is configured to implement a graphical user interface for one or more target devices coupled to the home audio video network by executing software stored in the memory, wherein the software causes the computer system to perform the steps for dynamically building the graphical user interface. The gas refiller is formed from an additional housing part connected to the accumulator housing to form a unit.